Breakfast & Brunch > Breakfast & Brunch for a Crowd > Make-Ahead Breakfasts > Breakfast Casserole Recipes

Spinach and Feta Breakfast Casserole

A delicious and healthy breakfast casserole with spinach, feta cheese, and a creamy egg custard. Perfect for a vegetarian brunch and can be prepared in advance.

Prep Time
20 minutes
Cook Time
35-45 minutes
Servings
6-8
Ingredients
  • 10 ounces Frozen spinach
  • 4 ounces Feta cheese
  • 8 Eggs
  • 1 1/2 cups Milk
  • 1/2 cup Heavy cream
  • 1/4 cup Diced red onion
  • 2 cloves Garlic
  • 1/2 teaspoon Salt
  • 1/4 teaspoon Black pepper
  • 1/4 teaspoon Nutmeg
  • 1 tablespoon Olive oil

Prepare the Spinach

Thaw the frozen spinach and squeeze out any excess water. This is important to prevent a soggy casserole. Set aside.

Sauté Onion and Garlic

Heat the olive oil in a skillet over medium heat. Add the diced red onion and minced garlic. Sauté until softened, about 3-5 minutes.

Combine Spinach, Onion, and Garlic

In a large bowl, combine the sautéed onion and garlic with the squeezed spinach. Crumble the feta cheese over the mixture and stir gently to combine.

Prepare the Egg Custard

In a separate bowl, whisk together the eggs, milk, heavy cream, salt, pepper, and nutmeg. Whisk until the mixture is smooth and well combined.

Assemble the Casserole

Grease an 8x8 inch baking dish. Spread the spinach, feta, onion, and garlic mixture evenly in the dish. Pour the egg custard over the top, making sure to cover all the ingredients. Gently press down on the mixture to ensure everything is submerged in the egg custard.

Refrigerate Overnight

Cover the baking dish with plastic wrap and refrigerate overnight (or for at least 4 hours). This allows the flavors to meld together.

Bake the Casserole

Preheat oven to 375°F (190°C). Remove the plastic wrap from the baking dish and bake for 35-45 minutes, or until the casserole is golden brown and set. A knife inserted into the center should come out clean. If the top starts to brown too quickly, you can loosely cover it with aluminum foil.

Cool and Serve

Let the casserole cool for a few minutes before cutting into squares and serving. Garnish with fresh herbs, if desired. Enjoy!

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FAQ

  • Can I use fresh spinach instead of frozen?

    Yes, you can use about 1 pound of fresh spinach. Sauté it until wilted before adding it to the casserole.
  • Can I substitute the feta cheese?

    Yes, you can use goat cheese, ricotta cheese, or mozzarella cheese as a substitute.
  • Is this casserole gluten-free?

    Yes, this casserole is naturally gluten-free.
  • Can I add other vegetables?

    Yes, sun-dried tomatoes, artichoke hearts, or mushrooms would be delicious additions.