Breakfast Casserole with Spinach Feta (Print)

Satisfying, savory breakfast with spinach, feta, and eggs. Ideal for brunch or make-ahead mornings.

# Components:

→ Produce

01 - 1 small yellow onion, finely chopped
02 - 3 cups fresh spinach, roughly chopped (or 10 oz frozen spinach, thawed and drained)

→ Dairy & Eggs

03 - 8 large eggs
04 - 1 cup whole milk
05 - 1 cup crumbled feta cheese
06 - 1/2 cup shredded mozzarella cheese (optional)

→ Pantry

07 - 1 tablespoon olive oil
08 - 2 cups cubed day-old bread (such as sourdough or French bread)
09 - 1/2 teaspoon salt
10 - 1/4 teaspoon ground black pepper
11 - 1/4 teaspoon ground nutmeg (optional)

→ For Greasing

12 - Butter or nonstick spray

# Directions:

01 - Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish with butter or nonstick spray.
02 - In a skillet over medium heat, warm the olive oil. Sauté the chopped onion until softened and translucent, approximately 3-4 minutes. Add the spinach and cook until wilted (if using fresh) or heated through (if using frozen). Remove from heat and allow to cool slightly.
03 - In a large mixing bowl, vigorously whisk together the eggs, milk, salt, ground black pepper, and ground nutmeg (if using).
04 - Gently fold the sautéed spinach and onion mixture, cubed bread, crumbled feta, and shredded mozzarella (if using) into the egg mixture until evenly distributed and the bread is well-coated.
05 - Pour the combined mixture into the prepared baking dish, spreading it evenly. Bake for 35-40 minutes, or until the center is set and the top is lightly golden.
06 - Allow the casserole to rest for 5 minutes before slicing and serving.

# Chef Secrets:

01 -
  • Uses common ingredients you may already have
  • Preps in just fifteen minutes so ideal for busy mornings
  • Customizable with fun mix ins or leftovers from the fridge
  • Bakes up golden and flavorful with very little mess
02 -
  • Packed with protein and greens for balanced energy
  • Delicious served hot or cold and great for meal prep
  • Feeds a crowd or works as easy leftovers
03 -
  • Toast the bread cubes slightly before using for extra body and richness
  • Let the casserole rest after baking to firm up and slice cleanly
  • Do not overbake or the eggs can toughen check for just set with a small jiggle in the center
  • Use fresh spinach when you want a milder flavor and delicate texture but keep frozen spinach on hand for convenience because it never lets you down. The recipe is endlessly flexible and forgiving so do not be afraid to make it your own for any occasion.

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