Egg & Spinach Casserole (Easy, Healthy & Versatile)

Description

Egg & Spinach Casserole is a wholesome, protein-packed breakfast casserole that’s easy to prepare and perfect for meal prep, brunch, or a quick family breakfast. Made with fluffy eggs, fresh spinach, colorful bell peppers, onions, and melted cheese, this casserole bakes into a light, tender dish that’s full of flavor and nutrition. Every slice is loaded with vegetables and creamy cheese while remaining light enough for a healthy start to the day. It’s naturally low in carbohydrates, high in protein, and incredibly versatile—you can customize it with your favorite vegetables, herbs, or cheeses. Whether you’re serving it fresh from the oven for weekend brunch or making it ahead for busy weekday mornings, this casserole reheats beautifully and tastes just as delicious the next day. Pair it with fresh fruit, toast, or a simple green salad for a complete and satisfying meal.

Ingredients For the Egg Mixture

• 8 large eggs
• ½ cup whole milk
• ½ teaspoon salt
• ½ teaspoon black pepper
• 1 teaspoon garlic powder
• ½ teaspoon onion powder
• 1 teaspoon Italian seasoning

For the Vegetables

• 3 cups fresh spinach, roughly chopped
• 1 small onion, diced
• 1 red bell pepper, diced
• 1 tablespoon olive oil

For the Cheese

• 1½ cups shredded mozzarella cheese
• ½ cup shredded cheddar cheese
• ¼ cup grated Parmesan cheese

For Garnish

• Fresh chopped parsley
• Cracked black pepper

Step-by-Step Instructions

Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C). Grease a 9×9-inch baking dish with butter or non-stick cooking spray.

Step 2: Cook the Vegetables

Heat the olive oil in a skillet over medium heat. Add the diced onion and bell pepper and cook for about 4–5 minutes until softened. Stir in the chopped spinach and cook for another 1–2 minutes until wilted. Remove from the heat and allow the vegetables to cool slightly.

Step 3: Prepare the Egg Mixture

In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, onion powder, and Italian seasoning until the mixture is smooth and slightly frothy.

Step 4: Add the Cheese

Stir the mozzarella, cheddar, and Parmesan cheese into the egg mixture, reserving a small handful of mozzarella for topping.

Step 5: Combine Everything

Fold the cooked vegetables into the egg mixture and stir gently until evenly distributed.

Step 6: Fill the Baking Dish

Pour the mixture into the prepared baking dish and spread it evenly. Sprinkle the remaining mozzarella cheese over the top.

Step 7: Bake

Bake for 30–35 minutes, or until the casserole is puffed, lightly golden, and the center is fully set. A knife inserted into the center should come out clean.

Step 8: Cool Slightly

Remove the casserole from the oven and let it rest for 5–10 minutes before slicing. This helps the casserole firm up and makes serving easier.

Step 9: Serve

Cut into squares and garnish with chopped parsley and freshly cracked black pepper. Serve warm with fresh fruit, toast, avocado, or a side salad.

Tips & Notes

• Fresh spinach gives the best flavor, but frozen spinach can also be used. Be sure to thaw and squeeze out excess moisture before adding it.
• Feel free to add mushrooms, zucchini, broccoli, or diced tomatoes for extra vegetables.
• Feta, Swiss, Monterey Jack, or pepper jack cheese can be substituted for different flavors.
• Store leftovers in an airtight container in the refrigerator for up to 4 days.
• Individual slices can be frozen for up to 2 months and reheated in the microwave or oven.

Q&A

Q: Can I make this casserole ahead of time?
Yes. Assemble the casserole the night before, cover it, and refrigerate overnight. Bake it fresh the next morning.

Q: Can I add cooked meat?
Absolutely. Cooked bacon, ham, turkey sausage, or shredded chicken are great additions.

Q: How do I know when it’s fully cooked?
The center should be firm and no longer jiggly. A knife inserted into the middle should come out clean.

Servings & Nutrition

Servings: 6

Approximate Nutrition Per Serving

• Calories: 255
• Protein: 19g
• Carbohydrates: 5g
• Fat: 18g
• Saturated Fat: 7g
• Fiber: 1g
• Sugar: 3g
• Sodium: 420mg