High Protein Pizza Casserole – A Cozy, Weeknight-Friendly Favorite

If you love pizza flavors but want something more filling and protein-packed, this casserole is your new go-to. It delivers all the cheesy, saucy comfort you crave with a smart, high-protein twist. You’ll layer lean meats, fiber-rich veggies, and melty cheese in one pan, then bake until bubbly.

The best part? It reheats like a dream, so leftovers are never a problem. Whether you’re feeding a busy family or meal prepping for the week, this recipe checks all the boxes.

High Protein Pizza Casserole – A Cozy, Weeknight-Friendly Favorite

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 6 servings

Ingredients Method

Ingredients

  

• 1 pound lean ground turkey or chicken (93% lean or leaner)
• 8 ounces turkey pepperoni (or regular, sliced thin)
• 2 cups part-skim shredded mozzarella cheese
• 1 cup low-fat cottage cheese (small curd)
• 1 large egg
• 2 cups no-sugar-added marinara sauce
• 1 small yellow onion, diced
• 1 red or green bell pepper, diced
• 8 ounces mushrooms, sliced
• 2 cloves garlic, minced
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• 1/2 teaspoon crushed red pepper flakes (optional)
• 1/2 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 1 tablespoon olive oil (or avocado oil)
• Fresh basil or parsley for garnish (optional)

Method

 

1. Preheat and prep: Heat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish or similar casserole pan.
2. Brown the meat: Warm a large skillet over medium heat. Add olive oil, then the ground turkey. Season with salt and black pepper. Cook, breaking it up with a spoon, until no longer pink, about 6–8 minutes.
3. Sauté the veggies: Add onion, bell pepper, and mushrooms to the skillet. Cook until softened and most of the moisture cooks off, 5–7 minutes. Stir in garlic and cook 30 seconds more.
4. Season it up: Sprinkle in oregano, basil, and crushed red pepper flakes if using. Stir to coat the meat and veggies evenly.
5. Add the sauce: Pour in the marinara and simmer 2–3 minutes to meld flavors. Taste and adjust salt and pepper as needed. Remove from heat.
6. Mix the protein layer: In a medium bowl, whisk the egg. Stir in cottage cheese and half of the shredded mozzarella (1 cup). This creates a creamy, high-protein layer that sets in the oven.
7. Assemble the casserole: Spread half of the meat sauce in the baking dish. Dollop and gently spread the cottage cheese mixture over that layer. Top with the remaining meat sauce.
8. Add toppings: Scatter the remaining mozzarella over the top. Arrange turkey pepperoni evenly so each portion gets a few slices.
9. Bake: Cover loosely with foil and bake for 15 minutes. Remove the foil and bake another 10–12 minutes, until the cheese is melted and the edges are bubbling.
10. Rest and serve: Let the casserole rest 8–10 minutes so it slices cleanly. Garnish with fresh basil or parsley if you like. Slice and serve warm.

What Makes This Recipe So Good

• Big pizza flavor, better macros: You get classic pepperoni, Italian herbs, and gooey cheese without a heavy carb load.
• Protein from multiple sources: Ground turkey or chicken, low-fat cottage cheese, and part-skim mozzarella boost protein while keeping calories reasonable.
• Great for meal prep: It holds up well for 3–4 days, and slices reheat quickly for fast lunches or dinners.
• Customizable: Swap veggies, use your favorite marinara, and adjust toppings to fit your taste or dietary needs.
• Family-friendly: It tastes like pizza night, but with more nutrients and less fuss.

Shopping List

• 1 pound lean ground turkey or chicken (93% lean or leaner)
• 8 ounces turkey pepperoni (or regular, sliced thin)
• 2 cups part-skim shredded mozzarella cheese
• 1 cup low-fat cottage cheese (small curd)
• 1 large egg
• 2 cups no-sugar-added marinara sauce
• 1 small yellow onion, diced
• 1 red or green bell pepper, diced
• 8 ounces mushrooms, sliced
• 2 cloves garlic, minced
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• 1/2 teaspoon crushed red pepper flakes (optional)
• 1/2 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 1 tablespoon olive oil (or avocado oil)
• Fresh basil or parsley for garnish (optional)

Instructions

1. Preheat and prep: Heat your oven to 375°F (190°C).

   Lightly grease a 9×13-inch baking dish or similar casserole pan.

2. Brown the meat: Warm a large skillet over medium heat. Add olive oil, then the ground turkey. Season with salt and black pepper.

   Cook, breaking it up with a spoon, until no longer pink, about 6–8 minutes.

3. Sauté the veggies: Add onion, bell pepper, and mushrooms to the skillet. Cook until softened and most of the moisture cooks off, 5–7 minutes. Stir in garlic and cook 30 seconds more.
4. Season it up: Sprinkle in oregano, basil, and crushed red pepper flakes if using.

   Stir to coat the meat and veggies evenly.

5. Add the sauce: Pour in the marinara and simmer 2–3 minutes to meld flavors. Taste and adjust salt and pepper as needed. Remove from heat.
6. Mix the protein layer: In a medium bowl, whisk the egg.

   Stir in cottage cheese and half of the shredded mozzarella (1 cup). This creates a creamy, high-protein layer that sets in the oven.

7. Assemble the casserole: Spread half of the meat sauce in the baking dish. Dollop and gently spread the cottage cheese mixture over that layer.

   Top with the remaining meat sauce.

8. Add toppings: Scatter the remaining mozzarella over the top. Arrange turkey pepperoni evenly so each portion gets a few slices.
9. Bake: Cover loosely with foil and bake for 15 minutes. Remove the foil and bake another 10–12 minutes, until the cheese is melted and the edges are bubbling.
10. Rest and serve: Let the casserole rest 8–10 minutes so it slices cleanly.

    Garnish with fresh basil or parsley if you like. Slice and serve warm.

Storage Instructions

• Refrigerator: Cool completely, then store in an airtight container for up to 4 days. Reheat individual portions in the microwave for 1–2 minutes or in a 350°F (175°C) oven for 10–12 minutes.
• Freezer: Wrap portions tightly or use freezer-safe containers.

  Freeze for up to 2 months. Thaw overnight in the fridge, then reheat until hot and bubbly.

• Meal prep tip: Slice into even squares and pack with a simple side salad for an easy office lunch.

Benefits of This Recipe

• High protein keeps you satisfied: Balanced macros help support energy, muscle recovery, and fewer snack attacks later.
• Lower in refined carbs: There’s no pasta or crust, so you keep pizza flavors without a heavy carb load.
• Vegetable boost: Peppers, onions, and mushrooms add fiber and micronutrients without overpowering the dish.
• Budget-friendly: Simple ingredients stretch into multiple meals, making it ideal for families or weekly prep.
• Kid-approved flavors: Familiar pizza toppings make it easy to introduce more protein and veggies.

Common Mistakes to Avoid

• Not cooking off moisture: Mushrooms and peppers release water. Sauté until most liquid evaporates, or the casserole can turn watery.
• Skipping the egg: The egg helps the cottage cheese layer set.

  Without it, your middle layer may be too loose.

• Overbaking: Too long in the oven dries out the meat and scorches the cheese. Bake just until bubbly and melted.
• Under-seasoning: Taste the sauce after simmering. Add a pinch of salt, pepper, or herbs if it needs a lift.
• Using a thin, sugary sauce: Choose a thicker marinara with no added sugar to keep flavors rich and macros in check.

Variations You Can Try

• Chicken sausage and spinach: Swap ground turkey for lean chicken sausage.

  Stir in a few cups of fresh spinach with the sauce until wilted.

• BBQ chicken twist: Use shredded cooked chicken, a half-and-half blend of marinara and no-sugar-added BBQ sauce, and top with red onion and a sprinkle of smoked paprika.
• Veggie lovers: Add zucchini, olives, and artichoke hearts. Keep an eye on moisture—salt and blot watery veggies first.
• Extra-hot version: Mix in hot Italian seasoning or diced pickled jalapeños and finish with a drizzle of hot honey if that fits your plan.
• Higher protein bump: Stir a scoop of unflavored whey or egg white powder into the cottage cheese mixture. Start with 1–2 tablespoons so flavor stays balanced.
• Dairy tweaks: Use lactose-free cottage cheese and mozzarella if needed, or swap part of the mozzarella with provolone for a different melt and flavor.

FAQ

Can I make this casserole ahead of time?

Yes.

Assemble it up to 24 hours in advance, cover tightly, and refrigerate. Add 5–10 extra minutes to the bake time if starting from cold.

What can I use instead of cottage cheese?

Part-skim ricotta works well. It’s slightly richer and less tangy.

If using ricotta, you can still add the egg to help it set.

How do I keep it from getting watery?

Cook the vegetables until most liquid evaporates, use a thicker marinara, and let the casserole rest before slicing. These small steps make a big difference.

Is this recipe gluten-free?

It can be. Use a gluten-free marinara and check the labels on pepperoni and sausage options.

Most cheeses and plain meats are naturally gluten-free.

Can I add pasta to make it heartier?

You can. Fold in 6–8 ounces of cooked high-protein pasta with the sauce before assembling. If you do, increase marinara by 1/2–1 cup so it doesn’t dry out.

What’s a good side dish with this?

A crisp green salad with a simple vinaigrette, roasted broccoli, or garlic green beans keeps the meal fresh and balanced without stealing the spotlight.

Wrapping Up

High Protein Pizza Casserole brings comfort-food satisfaction with smarter ingredients and impressive staying power.

It’s easy to customize, great for leftovers, and fits a busy week just as well as a relaxed Sunday dinner. Keep the steps simple, season boldly, and let the oven do the work. When you want pizza vibes with solid nutrition, this dish delivers every time.