Easy Low Carb Keto Crustless Pizza Casserole

This crustless pizza casserole gives you all the flavors of pizza without the carbs. It layers savory browned beef or sausage with tender peppers, mushrooms, tangy tomatoes and gooey cheese. The top melts golden and bubbly, the aroma is warm and inviting, and each bite is rich, cheesy and satisfying. It’s quick to make and perfect for weeknights or low-carb meals.

Recipe Information

• Prep Time: 15 minutes
• Cook Time: 30 minutes
• Total Time: 45 minutes
• Servings: 6
• Difficulty Level: Easy

Nutrition Information

Approximate per serving (based on 6 servings):

• Calories per serving: 384 kcal
• Protein: 28 g
• Carbohydrates: 5 g
• Fat: 28 g
• Fiber: 0.8 g
• Sugar: 1.3 g
• Sodium: 460 mg

Why Make This Easy Low Carb Keto Crustless Pizza Casserole

This casserole delivers familiar pizza flavors without a crust. It’s low in carbs and high in protein, so it fits a keto or low-carb plan. It cooks fast, uses simple pantry ingredients, and makes a great leftover meal. The melted mozzarella and grated Parmesan create a creamy, golden top while the seasoned meat and vegetables stay juicy below. It smells like comfort and feels like an indulgence, but keeps carbs low.

How to Make Easy Low Carb Keto Crustless Pizza Casserole

This recipe is straightforward: brown the meat, sauté the vegetables, mix everything with cheese and eggs, then bake until bubbly and golden. Follow the clear steps below for best results.

Ingredients:

• 1 pound ground beef or sausage
• 1 cup bell peppers, chopped
• 1 cup mushrooms, sliced
• 1 can (14 oz) diced tomatoes
• 2 cups shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 2 eggs
• 1 teaspoon Italian seasoning
• Salt and pepper to taste

Directions:

Step 1: Preparation

Preheat your oven to 350°F (175°C). Grease a casserole dish with cooking spray or a little oil so the casserole won’t stick.

Step 2: Sautéing the Meat

In a skillet over medium heat, cook the ground beef or sausage until browned and cooked through. Break it up as it cooks. Drain any excess grease and return the meat to the skillet.

Step 3: Sautéing Vegetables

Add the chopped bell peppers and sliced mushrooms to the skillet with the meat. Cook for 4–6 minutes, stirring, until the peppers soften and the mushrooms release moisture and begin to brown.

Step 4: Mixing Ingredients

In a large mixing bowl, combine the diced tomatoes (drained if you prefer less liquid), the cooked meat and vegetables, 1 1/2 cups of the mozzarella cheese, the Parmesan cheese, the eggs, Italian seasoning, salt, and pepper. Stir until well mixed and the eggs coat everything.

Step 5: Assembling the Casserole

Pour the mixture into the greased casserole dish and spread it evenly with a spatula. Smooth the top so it bakes evenly.

Step 6: Topping

Sprinkle the remaining 1/2 cup of mozzarella cheese evenly over the top of the casserole for a melty, golden finish.

Step 7: Baking

Bake in the preheated oven for 25–30 minutes, or until the cheese on top is bubbly and lightly golden and the center is set.

Step 8: Cooling and Resting

Let the casserole cool for 5–10 minutes before slicing. This helps it set so the slices hold together and the texture is creamy rather than runny.

How to Serve Easy Low Carb Keto Crustless Pizza Casserole

Serve warm in generous slices. Pair with a crisp green salad or steamed broccoli for a full meal. Garnish with fresh basil or chopped parsley for color and a bright herbal note. For a spicy kick, offer red pepper flakes or a drizzle of hot sauce. The casserole works well for family dinners, meal prep, or potlucks.

How to Store Easy Low Carb Keto Crustless Pizza Casserole

• Refrigerator: Store in an airtight container for up to 4 days. Reheat in the oven at 325°F (160°C) for 10–15 minutes or microwave individual portions for 1–2 minutes until warm.
• Freezer: Freeze portions in freezer-safe containers for up to 3 months. Thaw overnight in the fridge, then reheat in the oven until hot throughout.
• Tip: If freezing whole, wrap the dish tightly with foil and plastic wrap. Reheat from thawed for best texture.

Expert Tips for Perfect Easy Low Carb Keto Crustless Pizza Casserole

• Use lean ground beef or mild sausage depending on the flavor you want. Sausage adds more spice and fat; beef keeps it simple.
• Drain excess grease to avoid a greasy casserole. You want moist, not oily.
• If your diced tomatoes are very watery, drain some liquid to prevent the casserole from becoming soggy.
• Let the casserole rest after baking so it firms up and slices cleanly.
• For extra browning, place under the broiler for 1–2 minutes at the end—watch closely to avoid burning.
• Use freshly grated Parmesan for better melt and flavor than pre-grated packets.
• To reduce sodium, use low-sodium canned tomatoes or rinse regular canned tomatoes briefly.

Delicious Variations

• Pepperoni & Extra Cheese: Add 1 cup sliced pepperoni and swap mozzarella for part provolone for a pepperoni pizza feel.
• Veggie-Loaded: Add chopped spinach, zucchini, or eggplant to boost vegetables.
• Spicy Sausage: Use spicy Italian sausage and add a pinch of red pepper flakes.
• Chicken Option: Substitute cooked shredded chicken for the beef/sausage for a lighter version.
• Low-Fat: Use ground turkey and part-skim mozzarella to cut calories and fat.

Frequently Asked Questions

Q: Can I use turkey or chicken instead of beef or sausage?
A: Yes. Use cooked shredded chicken or ground turkey. Adjust cooking times for raw poultry in the skillet until fully cooked. Flavor will be lighter; add extra seasoning if needed.

Q: Can I make this dairy-free or lower in dairy?
A: You can reduce the cheese or use dairy-free cheese alternatives. Texture may change; dairy-free cheeses can be less melty. Add a spoonful of cream cheese (dairy or dairy-free) to improve creaminess if needed.

Q: How do I prevent the casserole from being watery?
A: Drain canned tomatoes or use crushed tomatoes with less liquid. Sauté vegetables until they release and then evaporate excess moisture. Don’t overfill the dish.

Q: Can I prepare this ahead of time?
A: Yes. Assemble the casserole and refrigerate for up to 24 hours before baking. Add an extra 5–10 minutes to the baking time if baking straight from cold.

Q: Is this recipe freezer-friendly?
A: Yes. Freeze individual portions or the whole baked casserole for up to 3 months. Thaw overnight in the fridge before reheating for best texture.

Q: How do I make the top extra crispy?
A: Sprinkle a thin layer of additional Parmesan on top before baking or broil for 1–2 minutes at the end. Watch closely to prevent burning.

Q: Can I add more vegetables without affecting the keto profile?
A: Yes—low-carb veggies like spinach, zucchini, and broccoli work well. Keep starchy vegetables like potatoes out to maintain low carbs.

Conclusion

This Easy Low Carb Keto Crustless Pizza Casserole is a simple, comforting dish that tastes like pizza in every cheesy bite. It’s quick to prepare, packs well for leftovers, and adapts easily to what you have on hand. For an alternate take and more keto pizza casserole ideas, see Keto Pizza Casserole at All Day I Dream About Food. Enjoy making this at home — it’s a reliable go-to when you want big flavor with fewer carbs.

Easy Low Carb Keto Crustless Pizza Casserole

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• Author: alicia
• Total Time: 45 minutes
• Yield: 6 servings 1x
• Diet: Keto, Low-Carb

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Description

A crustless pizza casserole that layers savory beef or sausage with peppers, mushrooms, tomatoes, and gooey cheese for a low-carb delight.

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Ingredients

Scale 1x2x3x

• 1 pound ground beef or sausage
• 1 cup bell peppers, chopped
• 1 cup mushrooms, sliced
• 1 can (14 oz) diced tomatoes
• 2 cups shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 2 eggs
• 1 teaspoon Italian seasoning
• Salt and pepper to taste

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Instructions

1. Preheat your oven to 350°F (175°C) and grease a casserole dish.
2. In a skillet, cook the ground beef or sausage over medium heat until browned and cooked through, then drain excess grease.
3. Add bell peppers and mushrooms to the skillet, cooking for 4–6 minutes until softened.
4. In a large bowl, combine diced tomatoes, cooked meat and vegetables, 1 1/2 cups mozzarella, Parmesan, eggs, Italian seasoning, salt, and pepper. Mix well.
5. Pour the mixture into the greased casserole dish and spread evenly.
6. Sprinkle the remaining 1/2 cup mozzarella on top.
7. Bake for 25–30 minutes until the cheese is bubbly and golden.
8. Let cool for 5–10 minutes before slicing and serving.

Notes

Serve warm and garnish with fresh herbs. Store leftovers in an airtight container. Can be frozen for up to 3 months.

• Prep Time: 15 minutes
• Cook Time: 30 minutes
• Category: Main Course
• Method: Baking
• Cuisine: Italian

Nutrition

• Serving Size: 1 serving
• Calories: 384
• Sugar: 1.3g
• Sodium: 460mg
• Fat: 28g
• Saturated Fat: 10g
• Unsaturated Fat: 18g
• Trans Fat: 0g
• Carbohydrates: 5g
• Fiber: 0.8g
• Protein: 28g
• Cholesterol: 180mg