High-Protein Spaghetti Casserole Recipe

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Most "high-protein" meal prep recipes make you give something up — flavor, texture, the part of a meal that actually makes you want to eat it. This casserole doesn't ask for that trade. It's cheesy, saucy, baked until the top turns golden — and it gets its protein from three places at once: lean ground turkey, cottage cheese stirred right into the sauce, and a protein-boosted pasta swapped in for regular spaghetti.

It has everything you want from comfort food: tender pasta, hearty meat sauce, creamy cottage cheese, and a melted mozzarella topping. But unlike a traditional baked spaghetti casserole, this version is built with lean protein and high-protein pasta to help keep you full and satisfied.

Best of all, it makes several servings at once, which means you can prep lunches or dinners for the week without cooking every single day.

With lean ground turkey, cottage cheese, and protein-enriched pasta, each serving delivers significantly more protein than traditional baked spaghetti, making it a practical option for muscle-building goals, post-workout meals, or simply staying full longer.

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Why You'll Love This Recipe

• High in protein and perfect for meal prep.
• Comforting, cheesy, and satisfying.
• Great for lunches or easy dinners.
• Freezer-friendly.
• Made with simple ingredients.
• Easy to portion for the week.

Recipe Information

Prep Time: 15 minutes
Cook Time: 25 minutes
Total Time: 40 minutes
Servings: 6 servings

Ingredients

• 1 pound lean ground turkey or lean ground beef
• 8 ounces high-protein spaghetti or pasta
• 2 cups marinara sauce
• 1 cup low-fat cottage cheese
• 1 cup shredded part-skim mozzarella cheese
• 1 teaspoon garlic powder
• 1 teaspoon Italian seasoning
• ½ teaspoon salt
• ¼ teaspoon black pepper
• Fresh basil or parsley, optional

Ingredients That Make The Difference

A few simple ingredient swaps turn this casserole into a protein-packed meal prep favorite without making it taste like a diet recipe.

• High-protein pasta adds extra protein compared to traditional spaghetti.
• Cottage cheese creates a creamy texture while boosting protein.
• Lean ground turkey keeps the casserole satisfying without adding too much fat.
• Marinara sauce keeps the pasta moist and flavorful after baking.
• Mozzarella cheese gives the casserole that classic golden, cheesy finish.

Why This Casserole Is Great For Meal Prep

This casserole holds up beautifully in the refrigerator and reheats well without becoming dry. The sauce keeps the pasta moist, while the cottage cheese adds creaminess and extra protein.

It also freezes well, making it perfect if you like preparing meals ahead of time. I like storing individual portions in glass meal prep containers so they are easy to reheat, freeze, and grab for lunch during the week (affiliate link).

Instructions

Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.

Step 2: Cook the Pasta

Cook the pasta according to package directions until al dente. Drain and set aside.

Step 3: Brown the Meat

In a large skillet over medium heat, cook the ground turkey or beef until browned. Season with garlic powder, Italian seasoning, salt, and black pepper.

Step 4: Mix the Casserole

In a large mixing bowl, combine cooked pasta, browned meat, marinara sauce, and cottage cheese. Stir until everything is evenly coated.

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Step 5: Add Cheese and Bake

Transfer the mixture to the prepared baking dish. Spread it evenly and top with shredded mozzarella cheese.

Bake for 20–25 minutes, or until the cheese is melted, bubbly, and lightly golden.

Step 6: Rest and Serve

Let the casserole rest for 5 minutes before slicing. Garnish with fresh basil or parsley if desired.

Expert Tips

• Cook the pasta just until al dente so it does not become too soft after baking.
• Blend the cottage cheese before mixing if you want a smoother sauce texture.
• Let the casserole rest before slicing so the portions hold together better.
• Use a flavorful marinara sauce since it makes a big difference in the final dish.
• Divide portions after cooling for easier grab-and-go meal prep.

Storage Instructions

Refrigerator

Store leftovers in an airtight container in the refrigerator for up to 4 days.

Freezer

Freeze individual portions for up to 3 months. Thaw overnight in the refrigerator before reheating.

Reheating

Reheat in the microwave until warm, or cover with foil and warm in a 350°F oven.

Recipe Variations

• Extra veggies: Add spinach, mushrooms, zucchini, or bell peppers.
• Spicy: Use spicy marinara or add red pepper flakes.
• Higher protein: Use chickpea pasta, lentil pasta, or extra lean meat.
• Creamier: Blend the cottage cheese before mixing it into the sauce.
• Beef version: Use 93% lean ground beef for a richer flavor.

What To Serve With It

• Simple green salad
• Roasted broccoli
• Garlic green beans
• Steamed vegetables
• Caesar salad
• Low-calorie garlic bread

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Frequently Asked Questions

Can I make this casserole ahead of time?

Yes. Assemble the casserole, cover it, and refrigerate for up to 24 hours before baking.

How much protein is in one serving?

The exact amount depends on the brands used, but most servings contain approximately 30–40 grams of protein.

What pasta works best?

High-protein spaghetti, chickpea pasta, lentil pasta, or protein-fortified pasta all work well.

Can I use ground chicken?

Yes. Ground chicken works well and can make the casserole even leaner.

Can I use ricotta instead of cottage cheese?

Yes. Ricotta works well, but cottage cheese usually adds more protein.

Is this good for weight loss?

It can fit into a weight-loss plan because it is high in protein and easy to portion. Exact results depend on serving size and overall daily intake.

Can I freeze it?

Yes. This casserole freezes very well when portioned into airtight containers.

Final Thoughts

This High-Protein Spaghetti Casserole proves that meal prep does not have to be bland or boring. It is cheesy, hearty, filling, and easy to portion for the week.

Whether you are working toward fat loss, muscle gain, or simply want easier weeknight meals, this casserole is a simple recipe worth keeping in your rotation.