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Healthy Crustless Breakfast Casserole with Spinach and Feta

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A fluffy, crustless breakfast casserole packed with spinach and salty feta, perfect for meal prep and busy mornings. This easy recipe comes together in under 40 minutes with simple ingredients.

Ingredients

Scale
  • 10 large eggs, room temperature
  • 5 ounces fresh spinach (about 5 cups)
  • 1 cup crumbled feta cheese
  • ½ cup shredded mozzarella cheese
  • ¼ cup milk (any kind)
  • 1 medium yellow onion, diced
  • 2 cloves garlic, minced
  • 1 tablespoon olive oil
  • ½ teaspoon salt
  • ¼ teaspoon black pepper
  • ½ teaspoon dried oregano
  • ¼ teaspoon red pepper flakes (optional)

Instructions

  1. Preheat oven to 375°F (190°C). Grease an 8×8-inch baking dish with butter or cooking spray.
  2. Heat olive oil in a large skillet over medium heat. Add diced onion and cook for 3-4 minutes until soft and translucent.
  3. Add minced garlic and cook for 30 seconds until fragrant.
  4. Add spinach in handfuls, tossing with tongs, and cook for 2-3 minutes until completely wilted and the pan is mostly dry.
  5. Remove skillet from heat and let spinach mixture cool for 5 minutes.
  6. In a large bowl, whisk eggs and milk vigorously for about 1 minute until uniform and slightly frothy.
  7. Add salt, black pepper, dried oregano, and red pepper flakes (if using). Whisk again to combine.
  8. Fold in cooled spinach mixture, crumbled feta, and shredded mozzarella until evenly distributed.
  9. Pour mixture into prepared baking dish and spread evenly.
  10. Bake for 25-30 minutes until center is set but still slightly jiggly, and edges are golden brown.
  11. Let rest for 5 minutes before slicing and serving.

Notes

Sauté spinach first to remove excess moisture and prevent a watery casserole. Let the spinach mixture cool before adding to eggs to avoid scrambling. For meal prep, bake completely, cool, slice into portions, and refrigerate for up to 4 days or freeze for up to 3 months. Reheat individual portions in the microwave for 45-60 seconds or whole casserole in a 350°F oven for 10-15 minutes.

Nutrition

Keywords: crustless breakfast casserole, spinach feta casserole, healthy breakfast, meal prep breakfast, gluten-free breakfast, low-carb breakfast

Find it online: https://fizzlefork.com/healthy-crustless-breakfast-casserole-with-spinach-and-feta/