High Protein Ground Turkey Casserole

This high protein ground turkey casserole is one of those weeknight dinners that checks every box. It is filling, loaded with lean protein, and comes together with simple ingredients you probably already have on hand.

I still remember the first time I threw this together on a busy Tuesday. The bubbly cheese browning in the oven, the savory smell of garlic and herbs filling the kitchen, knowing every bite packed over 30g of protein. This high protein ground turkey casserole became an instant repeat. It also meal preps beautifully and reheats well all week long, which makes it a go-to for staying on track without spending hours cooking.

What You’ll Need to Build This Protein-Packed Casserole

I always keep lean ground turkey stocked in my freezer for recipes like this. The combination of cottage cheese and Greek yogurt might surprise you, but it is the secret to that creamy, rich texture without loading up on extra fat. Pro tip: small curd cottage cheese blends more smoothly into the egg mixture for a better final texture.

• 1 lb (450g) lean ground turkey
• 1 tbsp olive oil
• 1 medium onion, diced
• 2 cloves garlic, minced
• 1 bell pepper (any color), diced
• 1 cup mushrooms, sliced
• 1 cup cottage cheese (small curd preferred)
• 1/2 cup plain Greek yogurt
• 2 large eggs
• 1 tsp dried oregano
• 1 tsp dried basil
• 1/2 tsp garlic powder
• Salt and pepper to taste
• 1 cup shredded cheddar cheese
• 1/2 cup parmesan cheese, grated
• Fresh parsley for garnish (optional)

How to Make High Protein Ground Turkey Casserole Step by Step

I recommend reading through all the steps before you start. This high protein ground turkey casserole comes together in a logical sequence, so having everything prepped saves you from scrambling mid-cook.

Step 1: Preheat your oven to 375 degrees F (190 degrees C). Lightly grease a 9×13 inch baking dish and set aside.

Step 2: Heat olive oil in a large skillet over medium-high heat. Add the ground turkey and cook until fully browned, breaking it apart with a spoon as it cooks. This takes about 6-8 minutes. Drain all excess fat and liquid well before continuing. Skipping this step is the number one reason casseroles turn out watery.

Step 3: Add the diced onion, garlic, bell pepper, and mushrooms to the skillet. Cook for 5-7 minutes, stirring occasionally, until the vegetables are soft. Season with oregano, basil, garlic powder, salt, and pepper. The mixture should smell warm and savory at this point.

Step 4: In a separate bowl, whisk together the cottage cheese, Greek yogurt, and eggs until smooth and well combined. The mixture will look creamy and slightly thick.

Step 5: Spread the turkey and vegetable mixture evenly across the bottom of your prepared baking dish. Press it into an even layer so every slice is balanced.

Step 6: Pour the cottage cheese mixture evenly over the turkey layer. Use a spatula to spread it gently to the edges.

Step 7: Sprinkle the shredded cheddar and parmesan evenly over the top. For extra golden color, add a final light dusting of parmesan in the last 5 minutes of baking.

Step 8: Bake for 25-30 minutes until the cheese on top is golden brown and the edges are bubbling. If the cheese starts to brown too quickly, tent loosely with foil for the remaining bake time.

Step 9: Remove from the oven and let the casserole rest for 5-10 minutes before slicing. This resting time helps it set so it cuts cleanly. Garnish with fresh parsley if desired.

Best Sides to Serve With This High Protein Casserole

This casserole pairs beautifully with light, fresh sides that balance the rich, cheesy topping. Here are some of the best sides for high protein ground turkey casserole:

Simple green salad: A crisp salad with lemon vinaigrette cuts through the richness and adds freshness to the plate without extra calories.

Cauliflower rice: A favorite low-carb option that soaks up the casserole juices perfectly and keeps the meal gluten-free and light.

Roasted asparagus or broccoli: The slight char on roasted vegetables adds a savory contrast that complements the creamy cheese topping.

Avocado slices: Creamy avocado adds healthy fat and makes each bite feel more satisfying without derailing your nutrition goals.

Fresh salsa: A spoonful of tomato salsa adds brightness and a pop of flavor that takes this dish in a slightly different, more vibrant direction.

More Delicious Dinners to Add to Your Weekly Menu

This high protein ground turkey casserole fits perfectly into a weekly meal prep routine alongside other hearty, protein-packed dinners. For another satisfying baked option with bold flavor, the High Protein Chicken Alfredo Bake is a natural companion, or try the Easy Baked Queso Chicken for a cheesy weeknight win that comes together just as easily.

If you enjoy the simplicity of one-dish meals, the Best French Onion Ground Beef and Rice Casserole and the Honey BBQ Chicken Rice both make excellent additions to any dinner rotation. Round out the week with a lighter option like the Garlic Butter Chicken Bowtie Pasta for variety without sacrificing flavor or ease.

Keeping Your Turkey Casserole Fresh All Week

This high protein ground turkey casserole stores very well, which is exactly why it earns a spot in regular meal prep rotations. Once fully cooled, transfer leftovers to an airtight container and refrigerate for up to 4 days.

To reheat, microwave individual portions for 1-2 minutes, or warm a larger portion in a 350 degree F (175 degrees C) oven for 15-20 minutes. I recommend covering it loosely with foil when reheating in the oven to keep the cheese from drying out.

For longer storage, freeze individual portions in freezer-safe containers for up to 3 months. Thaw overnight in the refrigerator before reheating. Pro tip: freeze in single-serving sizes so you can grab exactly what you need without thawing a full batch.

Your Questions About Ground Turkey Casserole, Answered

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