Gluten-Free Turkey & Potato Breakfast Casserole

Makes: 6 Servings
Per Serving: 38g Protein | 396 Cal

Jump to Recipe

If you’re looking for a gluten free breakfast casserole recipe that’s high in protein, easy to prep, and actually keeps you full, this is one of my go-to recipes. It’s simple, balanced, and perfect for meal prep or busy mornings when you need something ready to go.

This high-protein turkey & potato breakfast casserole is packed with lean protein, hearty potatoes, and plenty of flavor from peppers, onions, and melty cheese. It bakes up in one dish and slices cleanly into individual portions, making it ideal for planning ahead.

Why This Is a Great Meal Prep Breakfast

This egg casserole is one of my favorite ways to stay consistent with nutrition. It’s:

• High in protein

• Easy to portion into individual servings

• Great for busy days

• A filling breakfast that keeps you satisfied

Why You’ll Love This Gluten-Free Breakfast Casserole Recipe

This gluten-free breakfast casserole is one of those recipes that just makes mornings easier, especially when you’re trying to eat more protein. It’s made with lean ground turkey, eggs, and egg whites, so you’re getting a really solid amount of protein in each serving without it feeling too heavy.

Everything in here is naturally gluten-free, using simple ingredients like potatoes, vegetables, and eggs. It’s a filling breakfast that you can make ahead, cut into portions, and have ready for the next day when you don’t feel like cooking.

Ingredients 

• Avocado oil or olive oil, for cooking and greasing

• 3 cups Trader Joe’s roasted potatoes, onions, and peppers

• 1 red bell pepper, diced

• ½–1 onion, diced

• 1 lb lean ground turkey

• 5 whole eggs

• 1½ cups egg whites

• 1 cup fat-free milk

• Fresh baby spinach, roughly chopped

• 2 squares Gouda cheese, torn

• 3/4 cup shredded three-cheese blend

• 1/2 cup shredded cheddar or Mexican blend cheese

• ½ cup shredded mozzarella cheese

• 1 tablespoon garlic powder

• 2 teaspoons paprika

• 1 teaspoon red pepper

•  Salt and black pepper, to taste

Instructions

1. Preheat the oven and prep the pan: Preheat the oven to 425°F and grease a 9 x 13-inch casserole dish.

2. Sauté the Trader Joe’s vegetable blend: Heat a large skillet over medium-high heat with a little oil. Add the frozen roasted potatoes, onions, and peppers to the skillet and let them brown, stirring minimally. Push the potatoes to one side of the skillet.

3. Cook the ground turkey: Add the ground turkey to the other side of the pan. Season the turkey with garlic powder, paprika, salt, and black pepper and cook until fully done.

4. Sauté the bell pepper and onion: Add the chopped bell pepper and onion to the turkey and cook briefly until softened.

5. Transfer to the prepped dish: Stir everything together, then transfer the mixture to the prepared casserole dish. Scatter the baby spinach evenly over the mixture.

6. Mix the eggs: In a bowl, whisk together the eggs, egg whites, and milk, then pour evenly over the casserole.

7. Add the cheese and bake: Tear the Gouda and mix it with the mozzarella, then gently fold it into the casserole. Top with the three-cheese blend and cheddar, then bake for about 20 minutes, or until the eggs are fully set.

8. Rest, slice, and serve: Let rest briefly, slice into 12 squares, and serve.

Nutrition Information (Per Serving - Makes 6 Servings)

• Calories: 396

• Protein: 38g

• Carbs: 14g

• Fat: 21g
  

Notes

• If you don’t have a Trader Joe’s, any frozen potato and onion blend works well. You can also dice regular potatoes or sweet potatoes, toss with oil and salt, roast at 425°F until tender and lightly golden, then proceed with the recipe.

• This is great served with sliced avocado, guacamole, or your favorite salsa on top.

Tips for Best Results

• Don’t overcrowd the skillet when browning potatoes, this helps them crisp instead of steam.

• Avoid overmixing once the egg mixture is added to prevent a dense texture.

• Let the casserole rest before slicing so it holds together cleanly.

• Make sure excess moisture cooks off from the vegetables for the best texture.

Storage & Reheating

How to Store

• Place slices in an airtight container and refrigerate for up to 4 days.

• You can also wrap individual portions in plastic wrap or aluminum foil for easy grab-and-go meals.

How to Reheat

• Microwave individual portions for a quick breakfast

• Or reheat in the oven for best texture

Easy Variations & Substitutions

Protein Options

• Swap ground turkey for turkey sausage or breakfast sausage.

Note: Some turkey sausage options are still fairly lean, while other breakfast sausages may be higher in fat and lower in protein. Check labels if you’re tracking macros.

Dairy Options

• Use fat-free milk as written, or swap in almond milk or another dairy-free milk if needed.

• Adjust the amount of cheese to fit your macros, less for lower fat or more for extra flavor.

• Skip the cheese or use dairy-free cheese to make this a dairy-free breakfast casserole.

Note: Changing the type or amount of dairy can affect both the flavor and overall macros, especially protein and fat.

Potato Options

• If you don’t have access to Trader Joe’s roasted potatoes, any frozen potato and onion blend will work well.

• You can also dice regular potatoes or sweet potatoes, toss them with a little oil and salt, and roast at 425°F until tender and lightly golden before using them in the recipe.

FAQs

• Is this gluten free breakfast casserole truly gluten-free?

  Yes, all of the ingredients in this recipe are naturally gluten-free. Just be sure to double-check labels on frozen potatoes, spice blends, and any packaged ingredients to make sure there are no hidden gluten ingredients.

• Can I make this ahead of time?

  Yes, this is a great make-ahead breakfast. You can bake the entire casserole, let it cool, then slice it into portions and store it in the fridge for the next day or throughout the week.

• Can I freeze this casserole?

  Yes. Let the casserole cool completely, then cut it into portions and wrap them tightly. Store in a freezer-safe container and freeze for up to a couple of months. Reheat straight from the fridge or thaw overnight before reheating.

• How do I know when it’s done baking?

  The center should be fully set and no longer jiggly. You can insert a knife or toothpick into the middle and if it comes out clean, it’s ready.

• Can I make this dairy-free?

  Yes, you can swap in dairy-free milk and cheese alternatives if needed. Just keep in mind the texture and flavor may be slightly different depending on what you use.

This gluten-free breakfast casserole is one of those easy recipes that just makes life easier. It’s high in protein, simple to throw together, and perfect to have on hand for a busy morning when you don’t feel like cooking. This baked casserole works just as well for your everyday routine as it does for a slower weekend brunch, and it fits right into a gluten-free diet without needing any extra swaps.

It’s also one of those make-ahead breakfast casseroles you can prep in advance and enjoy the next morning or throughout the week. If you’re trying to stay consistent with your nutrition and want something reliable, this is definitely a recipe worth keeping in your rotation.

Print

With ImageWithout Image

Turkey & Potato Breakfast Casserole

Yield: 6

Author: Ashley aka The Protein Snack Queen

High-protein gluten free breakfast casserole made with turkey, eggs, and potatoes. Perfect for meal prep, busy mornings, and a healthy gluten-free diet.

Ingredients

• Avocado oil or olive oil, for cooking and greasing
• 3 cups Trader Joe’s roasted potatoes, onions, and peppers
• 1 red bell pepper, diced
• ½–1 onion, diced
• 1 lb lean ground turkey
• 5 whole eggs
• 1½ cups egg whites
• 1 cup fat-free milk
• Fresh baby spinach, roughly chopped
• 2 squares Gouda cheese, torn
• 3/4 cup shredded three-cheese blend
• 1/2 cup shredded cheddar or Mexican blend cheese
• ½ cup shredded mozzarella cheese
• 1 tablespoon garlic powder
• 2 teaspoons paprika
• 1 teaspoon red pepper
• Salt and black pepper, to taste

Instructions

1. Preheat the oven and prep the pan: Preheat the oven to 425°F and grease a 9 x 13-inch casserole dish.
2. Sauté the Trader Joe’s vegetable blend: Heat a large skillet over medium-high heat with a little oil. Add the frozen roasted potatoes, onions, and peppers to the skillet and let them brown, stirring minimally. Push the potatoes to one side of the skillet.
3. Cook the ground turkey: Add the ground turkey to the other side of the pan. Season the turkey with garlic powder, paprika, salt, and black pepper and cook until fully done.
4. Sauté the bell pepper and onion: Add the chopped bell pepper and onion to the turkey and cook briefly until softened.
5. Transfer to the prepped dish: Stir everything together, then transfer the mixture to the prepared casserole dish. Scatter the baby spinach evenly over the mixture.
6. Mix the eggs: In a bowl, whisk together the eggs, egg whites, and milk, then pour evenly over the casserole.
7. Add the cheese and bake: Tear the Gouda and mix it with the mozzarella, then gently fold it into the casserole. Top with the three-cheese blend and cheddar, then bake for about 20 minutes, or until the eggs are fully set.
8. Rest, slice, and serve: Let rest briefly, slice into 12 squares, and serve.

Nutrition Facts

Calories

396

Fat

21 g

Carbs

14 g

Protein

38 g