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Healthy Egg White Breakfast Casserole {Without Bread}

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This Healthy Egg White Breakfast Casserole is a high-protein, low-carb, and gluten-free dish loaded with vegetables and lean sausage. It’s a perfect make-ahead breakfast to keep you full and energized all morning, without the need for bread.

Ingredients

Scale
  • 3 Italian pork or turkey sausages, casing removed
  • 1 red bell pepper, diced
  • 1 green bell pepper, diced
  • 1 cup chopped mushrooms
  • 1/4 cup diced red onion
  • 3 cups egg whites
  • 1 cup cottage cheese
  • 1/4 cup flour (optional; for structure)
  • 1 teaspoon garlic powder
  • 3/4 teaspoon salt
  • 1/2 teaspoon ground black pepper
  • 3/4 cup shredded cheese (any type)
  • Sliced green onion, for garnish

Instructions

  1. Preheat oven to 350°F (175°C). Spray a baking dish with cooking spray.
  2. In a skillet over medium heat, cook the sausage, breaking it into crumbles. Cook for 6–7 minutes or until browned. Drain the fat and spread the sausage evenly in the baking dish.
  3. In the same skillet, cook the red and green bell peppers, mushrooms, and red onion for 5–6 minutes, until softened. Spread the vegetables evenly over the sausage in the baking dish.
  4. In a blender, combine egg whites, cottage cheese, flour (if using), garlic powder, salt, and pepper. Blend until smooth.
  5. Pour the egg mixture evenly over the sausage and vegetables in the baking dish.
  6. Sprinkle the shredded cheese evenly on top.
  7. Bake for 40 minutes, or until the casserole is set and the top is lightly golden.
  8. Let cool for at least 10 minutes before slicing.
  9. Garnish with sliced green onion and serve warm.

Notes

  • Flour helps give structure to the casserole but can be omitted for a lower-carb option.
  • Cottage cheese adds richness and protein to the egg whites.
  • For convenience, use liquid egg whites from a carton.
  • You can whisk the egg mixture by hand, but blending gives a smoother texture.

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