Oven-Baked Spinach and Feta Breakfast Casserole
A Healthy, Easy, and Delicious Breakfast Recipe
Looking for a nutritious and hearty breakfast that’s both easy to make and perfect for meal prep? This Oven-Baked Spinach and Feta Breakfast Casserole is packed with protein, leafy greens, and creamy cheese, making it the ideal choice for a weekend brunch or weekday grab-and-go breakfast.
Ingredients (Serves 6–8):
1 tablespoon olive oil
1 small onion, finely chopped
2 cloves garlic, minced
5 ounces fresh spinach, roughly chopped
8 large eggs
1 cup milk
½ teaspoon salt
¼ teaspoon black pepper
¼ teaspoon ground nutmeg
1 cup crumbled feta cheese
½ cup shredded mozzarella cheese
Step-by-Step Instructions
Step 1: Preheat and Prep the Baking Dish
Preheat your oven to 350°F (175°C).
Lightly grease a 9×13-inch baking dish with olive oil to prevent sticking.
Step 2: Sauté Aromatics
In a large skillet, heat 1 tablespoon of olive oil over medium heat.
Add the finely chopped onion and minced garlic.
Sauté for about 5 minutes, or until the onion becomes soft and translucent.
Step 3: Cook the Spinach
Add the roughly chopped fresh spinach to the skillet.
Cook for 2–3 minutes, stirring occasionally, until the spinach wilts.
Remove from heat and let the mixture cool slightly.
Step 4: Prepare the Egg Mixture
In a large mixing bowl, crack and whisk together 8 large eggs.
Add 1 cup milk, ½ teaspoon salt, ¼ teaspoon black pepper, and ¼ teaspoon nutmeg.
Mix well until smooth and combined.
Step 5: Add Cheese and Spinach
Stir the sautéed spinach mixture into the egg mixture.
Add 1 cup crumbled feta and ¼ cup shredded mozzarella cheese, reserving the other half of the mozzarella for topping.
Step 6: Assemble the Casserole
Pour the egg and spinach mixture into the prepared baking dish.
Use a spatula to spread everything evenly.
Sprinkle the remaining ¼ cup mozzarella cheese over the top.
Step 7: Bake to Perfection
Place the dish in the preheated oven.
Bake for 35–40 minutes, or until the casserole is set in the center and the top is golden brown.
Step 8: Cool and Serve
Let the casserole rest for 5–10 minutes before slicing.
Serve warm or at room temperature. Great with toast, fruit, or a simple green salad.
Variations & Substitutions
Spicy Version: Add a pinch of red pepper flakes to the egg mixture.
Leafy Greens: Swap spinach with kale or Swiss chard.
Meat Lovers: Add pre-cooked bacon or sausage for extra protein.
Dairy-Free: Use plant-based cheese and non-dairy milk.
Gluten-Free: Ensure all ingredients used are certified gluten-free.
Storage & Reheating Tips
Refrigerator: Store leftovers in an airtight container for up to 4 days.
Freezer: Wrap portions in plastic wrap and freeze for up to 2 months.
Reheating: Warm in a 350°F oven for 10–15 minutes or microwave individual slices for 1–2 minutes.
Why You’ll Love This Spinach and Feta Breakfast Casserole
Quick and easy to prepare
Perfect for meal prep and make-ahead breakfasts
Packed with protein and fiber
Low-carb and customizable
Crowd-pleaser for brunches, holidays, and family gatherings