Meal prep is easier when you have a hearty casserole ready to portion out for the week. These healthy low carb casseroles are practical, satisfying, and simple to fit into a busy routine. Whether you’re planning lunches or an easy dinner, you’ll find plenty of ideas to make ahead and enjoy.
Helpful Tips Before You Start
A little planning helps your low carb casseroles stay tasty and easy to portion throughout the week.
Check Your Baking Dish
Choose a dish that fits the recipe’s serving size so the casserole cooks evenly. If you use a different size, start checking for doneness a little earlier or later.
Prep Ingredients Ahead
Chop vegetables and cook any meat before assembling, unless the recipe says otherwise. This makes meal prep quicker and helps prevent excess moisture in the casserole.
Cool Before Storing
Let the casserole cool before dividing it into airtight containers. Refrigerate portions promptly and follow each recipe’s storage guidance.
Keep Toppings Separate
Store crunchy toppings, fresh herbs, and sauces separately when possible. Add them just before serving to keep their texture and flavor fresh.
Crustless Spinach, Mushroom, and Feta Breakfast Casserole
This breakfast casserole pairs earthy mushrooms and tender spinach with tangy feta in a fluffy egg base. With no crust to prepare, it’s a simple low-carb option for a relaxed weekend breakfast or a week of ready-to-reheat meals.
Bake it in one dish, then cut it into easy portions once it has set. The feta adds salty, creamy bites, while the mushrooms and spinach keep each serving savory and satisfying.
Serves 4 people.
Ingredients
- 8 large eggs
- 1/4 cup heavy cream
- 1 tablespoon olive oil
- 8 ounces cremini mushrooms, sliced
- 5 ounces baby spinach
- 1/2 teaspoon garlic powder
- 1/4 teaspoon salt
- 1/8 teaspoon black pepper
- 3/4 cup crumbled feta cheese
Instructions
- Heat the oven to 375°F. Lightly grease an 8-inch square baking dish.
- Warm the olive oil in a large skillet over medium heat. Add the sliced mushrooms and cook for 6 to 8 minutes, stirring occasionally, until softened and their released liquid has mostly evaporated.
- Add the spinach to the skillet in batches, stirring until wilted. Remove the skillet from the heat.
- In a mixing bowl, whisk together the eggs, heavy cream, garlic powder, salt, and black pepper until evenly combined.
- Spread the mushroom and spinach mixture in the prepared baking dish. Sprinkle the crumbled feta over the vegetables, then pour the egg mixture evenly on top.
- Bake for 25 to 30 minutes, until the center is set and a knife inserted there comes out clean. Let the casserole rest for 5 minutes before slicing.
Extra Tips
Let the cooked vegetables cool slightly before adding them to the eggs so the mixture stays even and the spinach does not add excess moisture. For meal prep, cool the portions before refrigerating them in a covered container, then reheat gently until warmed through.Course: Breakfast Cuisine: Mediterranean Equipment: 8-inch Square Baking Dish, Large Skillet, Mixing Bowl, Whisk
Chicken Enchilada Casserole with Cauliflower Rice
This casserole brings the bold, saucy flavor of chicken enchiladas to an easy-to-portion meal prep dish. Cauliflower rice keeps the base low in carbs, while melted cheese adds a cozy finish.
Make it for weekday lunches or a simple family dinner. The cauliflower rice is tender, the chicken stays savory, and a spoonful of salsa gives each serving a bright, tangy lift.
Serves 4 people.
Ingredients
- 1 tablespoon olive oil
- 4 cups cauliflower rice
- 1/2 teaspoon salt
- 2 cups cooked, shredded chicken
- 1 cup red enchilada sauce
- 1/2 cup salsa
- 1 teaspoon ground cumin
- 1/2 teaspoon chili powder
- 1 cup shredded Monterey Jack cheese
- 2 tablespoons chopped fresh cilantro
Instructions
- Heat the oven to 375°F. Lightly grease an 8-inch square baking dish.
- Warm the olive oil in a large skillet over medium heat. Add the cauliflower rice and salt. Cook for 5 to 7 minutes, stirring occasionally, until tender and most of its moisture has evaporated.
- Stir in the shredded chicken, enchilada sauce, salsa, cumin, and chili powder. Cook for 2 to 3 minutes, stirring until everything is evenly coated and warmed through.
- Transfer the mixture to the prepared baking dish and spread it in an even layer. Sprinkle the Monterey Jack cheese over the top.
- Bake for 15 to 20 minutes, until the casserole is hot and the cheese is melted and bubbling. Let it rest for a few minutes, then sprinkle with cilantro before serving.
Extra Tips
Let the cauliflower rice cook until excess moisture has evaporated so the casserole holds together well. For meal prep, divide the cooled casserole into airtight containers and refrigerate. Reheat portions until hot, then add the cilantro just before serving.Course: Main Course Cuisine: Mexican Equipment: Large Skillet, 8-inch Square Baking Dish, Oven
Cheesy Broccoli and Cauliflower Casserole with Chicken
This casserole brings tender chicken and two low-carb vegetables together in a creamy cheddar sauce. It’s a practical choice for meal prep, with filling portions that are easy to reheat for lunch or dinner.
Broccoli and cauliflower stay nestled in the sauce beneath a golden, cheesy top. A little Dijon adds savory depth without overpowering the mild vegetables or chicken.
Serves 4 people.
Ingredients
- 2 cups cooked chicken breast, cut into bite-size pieces
- 2 cups broccoli florets
- 2 cups cauliflower florets
- 4 ounces cream cheese, softened
- ½ cup heavy cream
- 1 teaspoon Dijon mustard
- ½ teaspoon garlic powder
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 1½ cups shredded sharp cheddar cheese, divided
- 1 tablespoon olive oil
Instructions
- Heat the oven to 375°F. Lightly coat a medium baking dish with the olive oil.
- Steam the broccoli and cauliflower until just tender, about 5 minutes. Drain them well so excess water does not thin the sauce.
- In a mixing bowl, whisk the cream cheese and heavy cream until mostly smooth. Stir in the Dijon mustard, garlic powder, salt, and black pepper.
- Fold the cooked chicken, broccoli, cauliflower, and 1 cup of the cheddar into the cream cheese mixture. Transfer everything to the prepared baking dish and spread it evenly.
- Sprinkle the remaining ½ cup of cheddar over the top. Bake until the casserole is bubbling and the cheese is golden, about 20 minutes. Let it rest for a few minutes before portioning.
Extra Tips
For meal prep, divide the casserole into individual containers once it has cooled, then refrigerate and reheat until hot. Drain the vegetables thoroughly before mixing them into the sauce to help keep the casserole creamy rather than watery.Course: Main Course Cuisine: American Equipment: Steamer Basket, Mixing Bowl, Whisk, Baking Dish
Italian Sausage, Zucchini, and Eggplant Casserole
Italian sausage, zucchini, and eggplant bake together in a tomato-herb sauce for a filling, low-carb meal prep casserole. Browning the sausage and roasting the vegetables first helps build flavor and keeps the finished dish from becoming watery.
The tender vegetables and savory sausage make this a cozy dinner that also portions well for weekday lunches. A little mozzarella on top melts into a golden, cheesy finish.
Serves 4 people.
Ingredients
- 1 tablespoon olive oil
- 12 ounces Italian sausage, casings removed
- 1 medium eggplant, cut into ½-inch cubes
- 2 medium zucchini, cut into ½-inch half-moons
- 1 small yellow onion, diced
- 2 garlic cloves, minced
- 1 teaspoon dried Italian seasoning
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 1 cup no-sugar-added marinara sauce
- 1 cup shredded mozzarella cheese
- 2 tablespoons grated Parmesan cheese
Instructions
- Heat the oven to 400°F. Lightly grease a 2-quart baking dish.
- Heat the olive oil in a large skillet over medium heat. Add the sausage and cook, breaking it into small pieces, until browned and cooked through. Transfer it to a plate, leaving any drippings in the skillet.
- Add the eggplant, zucchini, and onion to the skillet. Cook for 7 to 9 minutes, stirring occasionally, until the vegetables begin to soften and the eggplant has taken on some color.
- Stir in the garlic, Italian seasoning, salt, and black pepper. Cook for 30 seconds, then stir in the marinara sauce and cooked sausage.
- Spoon the mixture into the prepared baking dish. Sprinkle the mozzarella and Parmesan evenly over the top.
- Bake uncovered for 20 to 25 minutes, until the vegetables are tender and the cheese is melted and lightly golden. Let the casserole rest for 5 minutes before serving.
Extra Tips
Cut the eggplant and zucchini into similarly sized pieces so they cook evenly. If the vegetables release extra liquid while cooking, let it simmer off before adding the marinara. For meal prep, portion the cooled casserole into airtight containers and reheat until hot.Course: Main Course Cuisine: Italian Equipment: Large Skillet, 2-Quart Baking Dish, Cutting Board, Knife
Salmon and Asparagus Casserole with Lemon-Dill Cream
This casserole pairs tender salmon and asparagus with a creamy sauce brightened by lemon and fresh dill. It’s a low-carb meal-prep option that feels fresh and satisfying without relying on pasta or grains.
The salmon stays flaky beneath a lightly golden top, while the asparagus adds a little bite. Portion it for weekday lunches or serve it warm for an easy family dinner.
Serves 4 people.
Ingredients
- 1 pound skinless salmon fillet, cut into 1-inch pieces
- 1 pound asparagus, woody ends trimmed and cut into 2-inch pieces
- 1 tablespoon olive oil
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 3/4 cup heavy cream
- 1/3 cup sour cream
- 1 teaspoon Dijon mustard
- 1 teaspoon lemon zest
- 1 tablespoon lemon juice
- 2 tablespoons chopped fresh dill
- 1/2 cup shredded Gruyère cheese
Instructions
- Heat the oven to 400°F. Lightly grease a medium baking dish with a little of the olive oil.
- Place the asparagus in the dish. Drizzle with the remaining olive oil, then season with half of the salt and pepper. Toss to coat and spread it in an even layer.
- In a bowl, whisk together the heavy cream, sour cream, Dijon mustard, lemon zest, lemon juice, and chopped dill. Stir in the remaining salt and pepper.
- Arrange the salmon pieces over the asparagus. Pour the lemon-dill cream evenly over the salmon and vegetables, then sprinkle the Gruyère over the top.
- Bake uncovered until the salmon is opaque and flakes easily and the asparagus is tender, about 20 to 25 minutes. Let the casserole rest for 5 minutes before serving.
Extra Tips
Cut the salmon into evenly sized pieces so they cook at the same rate, and check the casserole near the 20-minute mark to keep the fish tender. For meal prep, divide the casserole into containers once cooled and reheat portions gently so the salmon does not dry out.Course: Main Course Cuisine: American Equipment: Medium Baking Dish, Mixing Bowl, Whisk
Turkey Taco Casserole with Spaghetti Squash
This casserole brings taco-seasoned turkey, tender spaghetti squash, and melted cheese together in one easy-to-portion meal. It is a satisfying low-carb option for meal prep when you want familiar taco flavors without a tortilla.
The squash keeps the casserole light while adding a tender, slightly stringy texture. Serve it warm for dinner, or portion it into containers for simple lunches throughout the week.
Serves 4 people.
Ingredients
- 1 medium spaghetti squash
- 1 tablespoon olive oil
- 1 pound lean ground turkey
- 1 small yellow onion, diced
- 2 tablespoons tomato paste
- 2 teaspoons chili powder
- 1 teaspoon ground cumin
- 1 teaspoon smoked paprika
- ½ teaspoon garlic powder
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 1 cup canned diced tomatoes, drained
- 1 cup shredded cheddar cheese, divided
- 2 tablespoons chopped fresh cilantro
Instructions
- Heat the oven to 400°F. Carefully cut the spaghetti squash in half lengthwise and scoop out the seeds. Place the halves cut side down on a baking sheet and roast until tender, about 35 to 45 minutes. Let them cool enough to handle.
- Use a fork to scrape the squash flesh into strands. Transfer the strands to a clean kitchen towel and gently squeeze out excess moisture. This helps keep the casserole from becoming watery.
- While the squash roasts, heat the olive oil in a large skillet over medium heat. Add the diced onion and cook until softened, about 4 minutes.
- Add the ground turkey to the skillet. Break it into small pieces and cook until no longer pink. Stir in the tomato paste, chili powder, cumin, smoked paprika, garlic powder, salt, and black pepper.
- Stir the drained diced tomatoes into the turkey mixture. Cook for 2 to 3 minutes, then remove the skillet from the heat.
- Reduce the oven temperature to 375°F. Combine the spaghetti squash strands and turkey mixture in a baking dish. Stir in ½ cup of the cheddar, then spread the mixture evenly in the dish. Sprinkle the remaining cheddar over the top.
- Bake until the casserole is hot and the cheese has melted, about 15 to 20 minutes. Scatter the chopped cilantro over the top before serving.
Extra Tips
Squeezing the cooked squash well is the key to a casserole that holds together without excess liquid. For meal prep, let the casserole cool before dividing it into containers, and reheat portions until hot. Add the cilantro after reheating so it stays fresh and bright.Course: Main Course Cuisine: Mexican Equipment: Baking Sheet, Large Skillet, Baking Dish, Fork
Greek-Style Ground Beef and Cabbage Casserole
This casserole pairs savory ground beef with tender cabbage, tomatoes, oregano, and a little cinnamon for a Greek-inspired flavor. Feta and fresh parsley add a bright, salty finish.
It works well for meal prep because the hearty layers reheat easily for lunch or dinner. The cabbage softens as it bakes, while the beef and tomato mixture keeps each serving moist and satisfying.
Serves 4 people.
Ingredients
- 1 tablespoon olive oil
- 1 pound lean ground beef
- 1 medium yellow onion, diced
- 2 garlic cloves, minced
- 1 teaspoon dried oregano
- ¼ teaspoon ground cinnamon
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 medium green cabbage, cored and thinly sliced
- 1 can (14.5 ounces) diced tomatoes, drained
- ½ cup beef broth
- ½ cup crumbled feta cheese
- 2 tablespoons chopped fresh parsley
Instructions
- Preheat the oven to 375°F. Lightly grease a 9-by-13-inch baking dish.
- Heat the olive oil in a large skillet over medium heat. Add the ground beef and diced onion. Cook for 6 to 8 minutes, breaking up the beef, until it is browned and the onion is softened.
- Stir in the garlic, oregano, cinnamon, salt, and black pepper. Cook for 30 seconds, stirring so the garlic and spices are evenly mixed through the beef.
- Add the sliced cabbage to the skillet in batches, stirring until it begins to soften. Stir in the drained tomatoes and beef broth, then cook for 3 to 4 minutes, just until the cabbage has started to wilt.
- Transfer the mixture to the prepared baking dish and spread it into an even layer. Cover the dish with foil and bake for 25 minutes, until the cabbage is tender.
- Remove the foil and sprinkle the feta over the casserole. Bake uncovered for 5 minutes, until the feta is warmed through. Scatter the parsley on top before serving.
Extra Tips
Slice the cabbage thinly so it softens evenly in the oven, and drain the tomatoes well to keep the casserole from becoming watery. Divide leftovers into meal-prep containers once cooled, then reheat until hot and finish with a little extra parsley if you have some on hand.Course: Main Course Cuisine: Greek Equipment: Large Skillet, 9-by-13-inch Baking Dish, Foil
Pesto Chicken Casserole with Zucchini Noodles
This casserole pairs tender chicken and zucchini noodles with herby pesto, juicy cherry tomatoes, and a golden layer of mozzarella. It has the cozy feel of a baked pasta dish while keeping the ingredients low in carbs.
It works well for a make-ahead lunch or an easy weeknight dinner. Salting and draining the zucchini first helps keep the casserole from turning watery, while a quick bake leaves the noodles tender but not mushy.
Serves 4 people.
Ingredients
- 4 medium zucchini
- 1 teaspoon fine sea salt, divided
- 1 tablespoon olive oil
- 1 pound boneless, skinless chicken breast, cut into bite-size pieces
- 1/4 teaspoon black pepper
- 1 cup basil pesto
- 1 cup cherry tomatoes, halved
- 1 cup shredded mozzarella cheese
- 2 tablespoons grated Parmesan cheese
Instructions
- Heat the oven to 400°F. Lightly grease a 9-by-13-inch baking dish.
- Use a spiralizer to turn the zucchini into noodles. Place them in a colander, sprinkle with 1/2 teaspoon of the salt, and toss. Let them drain for 15 minutes, then gently press with paper towels to remove excess moisture.
- Meanwhile, heat the olive oil in a large skillet over medium-high heat. Season the chicken with the remaining 1/2 teaspoon salt and the black pepper. Cook, stirring occasionally, until the pieces are lightly browned and cooked through.
- Transfer the chicken to a large bowl. Add the drained zucchini noodles, pesto, and halved cherry tomatoes. Toss gently until everything is coated, then spread the mixture evenly in the baking dish.
- Sprinkle the mozzarella and Parmesan over the top. Bake for 15 to 20 minutes, until the cheese is melted and golden in spots and the casserole is bubbling around the edges. Let it rest for 5 minutes before serving.
Extra Tips
For meal prep, divide the baked casserole into individual portions and refrigerate once cooled. Reheat gently, since zucchini noodles soften as they sit. If your pesto is especially thick, toss it with the warm chicken first so it coats the noodles more easily.Course: Main Course Cuisine: Italian Equipment: Spiralizer, Colander, Large Skillet, 9-by-13-inch Baking Dish
Creamy Tuscan Shrimp and Cauliflower Casserole
This casserole pairs tender shrimp and cauliflower with a creamy, garlicky sauce, sun-dried tomatoes, and wilted spinach. Parmesan adds a savory finish, while Italian seasoning brings the Tuscan-inspired flavors together.
It makes a hearty, low-carb meal that’s handy for meal prep and easy to portion for the week. The cauliflower stays tender beneath the creamy sauce, and the shrimp cook quickly right in the baking dish.
Serves 4 people.
Ingredients
- 1 large head cauliflower, cut into bite-size florets
- 1 tablespoon olive oil
- 1 pound large shrimp, peeled and deveined
- 2 cloves garlic, minced
- 1 teaspoon Italian seasoning
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 cup heavy cream
- 1/3 cup chicken broth
- 1/3 cup sun-dried tomatoes packed in oil, drained and chopped
- 2 cups baby spinach
- 1/2 cup grated Parmesan cheese
Instructions
- Heat the oven to 400°F. Lightly grease a medium casserole dish.
- Place the cauliflower florets in a microwave-safe bowl with 2 tablespoons of water. Cover and microwave for 4 to 5 minutes, until just beginning to soften. Drain well, then transfer the cauliflower to the casserole dish.
- Pat the shrimp dry. In a bowl, toss them with the olive oil, garlic, Italian seasoning, salt, and black pepper.
- In a separate bowl, stir together the heavy cream and chicken broth. Fold in the sun-dried tomatoes and spinach.
- Pour the cream mixture over the cauliflower and arrange the seasoned shrimp on top. Sprinkle evenly with Parmesan.
- Bake uncovered for 18 to 22 minutes, until the shrimp are opaque and cooked through and the casserole is bubbling. Let it rest for 5 minutes before serving.
Extra Tips
Drain the cauliflower thoroughly so it does not water down the creamy sauce. For meal prep, divide the casserole into airtight portions once cooled and refrigerate. Reheat gently until warmed through, taking care not to overcook the shrimp.Course: Main Course Cuisine: Italian Equipment: Microwave-Safe Bowl, Casserole Dish, Mixing Bowls
Buffalo Chicken and Cauliflower Casserole
This Buffalo Chicken and Cauliflower Casserole brings together tender chicken, roasted cauliflower, and tangy Buffalo sauce in one easy meal-prep dish. Cream cheese and cheddar make the filling creamy, while a layer of melted cheese gives the top a satisfying finish.
Make it for a weeknight dinner or portion it out for lunches. It has a gently spicy, savory flavor and a hearty texture without relying on pasta or rice.
Serves 4 people.
Ingredients
- 1 large head cauliflower, cut into bite-size florets
- 1 tablespoon olive oil
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 2 cups cooked, shredded chicken
- 4 ounces cream cheese, softened
- 1/3 cup Buffalo sauce
- 1/4 cup sour cream
- 1 cup shredded cheddar cheese, divided
- 2 green onions, thinly sliced
Instructions
- Heat the oven to 400°F. Lightly grease a 9-by-9-inch baking dish.
- Place the cauliflower florets on a baking sheet. Toss with the olive oil, salt, and black pepper, then spread them in an even layer. Roast for 20 minutes, until just tender.
- While the cauliflower roasts, stir together the cream cheese, Buffalo sauce, and sour cream in a large bowl until smooth. Fold in the shredded chicken, 3/4 cup of the cheddar, and half of the sliced green onions.
- Add the roasted cauliflower to the bowl and gently stir until coated. Transfer the mixture to the prepared baking dish and spread it evenly.
- Sprinkle the remaining 1/4 cup cheddar over the top. Bake for 20 minutes, until hot and bubbling around the edges.
- Let the casserole rest for 5 minutes, then scatter the remaining green onions over the top before serving.
Extra Tips
Roasting the cauliflower before mixing it into the filling helps keep the casserole from becoming watery. For milder heat, use a little less Buffalo sauce and keep the cream cheese and sour cream amounts the same. Divide leftovers into meal-prep containers and reheat until hot.Course: Main Course Cuisine: American Equipment: Baking Sheet, 9-by-9-inch Baking Dish, Large Bowl
Low-Carb Shepherd’s Pie with Mashed Cauliflower
This low-carb shepherd’s pie layers a savory ground beef filling with creamy mashed cauliflower for a cozy casserole that works well for meal prep. It has the familiar comfort of a classic shepherd’s pie without a potato topping.
The beef and vegetable layer stays hearty, while the cauliflower topping bakes up soft with lightly golden edges. Portion it into individual servings for easy lunches or weeknight dinners.
Serves 4 people.
Ingredients
- 1 large head cauliflower, cut into florets
- 2 tablespoons unsalted butter
- 2 tablespoons sour cream
- ½ teaspoon salt, divided
- ¼ teaspoon black pepper, divided
- 1 tablespoon olive oil
- 1 pound lean ground beef
- 1 small yellow onion, diced
- 1 cup diced carrots
- 1 cup green beans, trimmed and cut into small pieces
- 2 tablespoons tomato paste
- ½ cup low-sodium beef broth
- 1 teaspoon dried thyme
- ½ cup shredded cheddar cheese
Instructions
- Heat the oven to 400°F. Place the cauliflower florets in a large pot and cover with water. Bring to a boil and cook until very tender, about 12 to 15 minutes. Drain thoroughly.
- Return the cauliflower to the pot. Add the butter, sour cream, and half of the salt and pepper. Mash until smooth, then set aside.
- Heat the olive oil in a large skillet over medium heat. Add the ground beef and cook, breaking it into small pieces, until browned. Add the onion, carrots, and green beans. Cook until the vegetables begin to soften, about 6 to 8 minutes.
- Stir in the tomato paste, beef broth, dried thyme, and the remaining salt and pepper. Simmer until the vegetables are tender and the filling has thickened slightly, about 5 minutes.
- Spoon the beef mixture into a baking dish and spread it into an even layer. Spoon the mashed cauliflower over the filling, then gently spread it to the edges. Sprinkle the shredded cheddar over the top.
- Bake for 20 to 25 minutes, until the filling is bubbling and the cheese is melted. Let the casserole rest for a few minutes before serving.
Extra Tips
Drain the cauliflower very well before mashing so the topping stays thick instead of watery. For meal prep, divide cooled portions into individual containers and refrigerate. Reheat until hot throughout, adding a small splash of beef broth if the filling seems dry.Course: Main Course Cuisine: American Equipment: Large Pot, Large Skillet, Baking Dish, Potato Masher
