Healthy Breakfast Casserole with Spinach and Feta
If you’re looking for a delicious and nutritious way to kickstart your day, this Healthy Breakfast Casserole with Spinach and Feta is just what you need. Packed with protein, fresh vegetables, and flavorful herbs, this casserole makes for a satisfying breakfast that can be enjoyed any day of the week. Not only is it simple to prepare, but it also keeps well, making it a perfect option for meal prep. Whether you’re feeding a crowd or just yourself, this dish is sure to impress.
Why This Recipe Is Reliable

This Healthy Breakfast Casserole with Spinach and Feta is not just another breakfast recipe; it’s a reliable choice that combines wholesome ingredients without sacrificing flavor. The eggs provide a hearty base, while the baby spinach adds a boost of nutrients. Feta cheese contributes a tangy richness, and when combined, these elements create a balanced and delectable meal. Plus, it’s easy to customize based on what you have in your fridge, making it a versatile recipe you can return to again and again.
What’s in the Bowl
To make this Healthy Breakfast Casserole with Spinach and Feta, gather the following ingredients:
- Olive oil spray – to coat the baking dish and prevent sticking.
- 1 teaspoon olive oil – for sautĂ©ing shallots.
- 3 shallots, chopped – for a hint of sweetness and depth of flavor.
- 6-ounce bag baby spinach – packed with vitamins and minerals.
- 24 large eggs, beaten – the main protein source for the casserole.
- 2 cups 2% milk – adds creaminess without being too heavy.
- 1/2 cup heavy cream – for extra richness (you can substitute with a lighter option if desired).
- 12 ounces feta cheese, crumbled – provides a salty and tangy flavor.
- 3 scallions, chopped – for a fresh, oniony bite.
- 3 plum tomatoes, seeded and diced – adds freshness and color.
- 2 1/2 teaspoons kosher salt – enhances the overall flavors.
- Black pepper, to taste – for seasoning.
Prep & Cook Tools
To make the process smooth and enjoyable, have the following tools ready:
- Large mixing bowl – for combining the egg mixture.
- Whisk – to beat the eggs and mix ingredients thoroughly.
- Skillet – for sautĂ©ing shallots and spinach.
- Baking dish (9×13 inches) – the vessel for baking the casserole.
- Measuring cups and spoons – for accurately measuring ingredients.
- Spatula – for folding the ingredients together and serving.
Cook Healthy Breakfast Casserole with Spinach and Feta Like This

Now that you have everything ready, follow these steps to create your Healthy Breakfast Casserole with Spinach and Feta:
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This will ensure that your casserole bakes evenly and comes out perfectly cooked.
Step 2: Sauté the Shallots
In a skillet, heat 1 teaspoon of olive oil over medium heat. Add the chopped shallots and sauté for about 3-4 minutes, or until they become translucent and fragrant.
Step 3: Add the Spinach
Once the shallots are ready, add the baby spinach to the skillet. Cook until wilted, which should take about 2-3 minutes. Stir occasionally to ensure even cooking. Remove from heat and let cool slightly.
Step 4: Mix the Egg Mixture
In a large mixing bowl, whisk together the beaten eggs, milk, and heavy cream. Season with kosher salt and black pepper to taste.
Step 5: Combine Ingredients
Add the cooked shallots and spinach to the egg mixture. Next, gently fold in the crumbled feta cheese, chopped scallions, and diced tomatoes. Ensure everything is well combined.
Step 6: Prepare the Baking Dish
Lightly spray your baking dish with olive oil spray to prevent sticking. Pour the egg mixture into the prepared dish, spreading it evenly.
Step 7: Bake
Place the baking dish in the preheated oven and bake for 40-45 minutes, or until the casserole is set and lightly golden on top. You can check for doneness by inserting a knife into the center; it should come out clean.
Step 8: Cool and Serve
Once baked, remove the casserole from the oven and let it cool for a few minutes. Cut into squares and serve warm. Enjoy your delicious Healthy Breakfast Casserole with Spinach and Feta!
Tailor It to Your Diet

This casserole is versatile and can easily be tailored to fit different dietary preferences:
- Vegetarian – This recipe is already vegetarian-friendly.
- Gluten-free – The ingredients used are naturally gluten-free.
- Dairy-free – Substitute the heavy cream and milk with almond milk or coconut milk, and use a dairy-free cheese alternative.
- Low-carb – Reduce the amount of milk and heavy cream or substitute with a low-carb alternative.
Easy-to-Miss Gotchas
When preparing the Healthy Breakfast Casserole with Spinach and Feta, keep these points in mind to ensure the best results:
- Make sure to thoroughly beat the eggs for a fluffy texture.
- Don’t overcrowd the skillet while sautéing the shallots and spinach; this can lead to steaming instead of sautéing.
- Let the casserole cool slightly before cutting to help it set properly.
- Use fresh ingredients for the best flavor and nutrition.
Store, Freeze & Reheat
This Healthy Breakfast Casserole with Spinach and Feta is perfect for meal prep, and here’s how to store it properly:
If you have leftovers, store them in an airtight container in the refrigerator for up to 5 days. For longer storage, you can freeze individual portions. Wrap each portion tightly in plastic wrap and then place in a freezer-safe bag. The casserole can be frozen for up to 3 months.
To reheat, simply thaw in the refrigerator overnight and then warm in the microwave or oven until heated through. This makes it easy to enjoy a healthy breakfast on busy mornings!
Your Questions, Answered
Can I make the casserole ahead of time?
Absolutely! You can prepare the casserole the night before and store it in the refrigerator. Just pop it in the oven in the morning, and you’ll have a delicious breakfast ready to go.
Can I use different vegetables in this casserole?
Yes! Feel free to substitute or add other vegetables like bell peppers, mushrooms, or zucchini based on your preference. Just make sure to sauté them first to release any excess moisture.
How do I know when the casserole is done baking?
The casserole is done when the center is set and a knife inserted comes out clean. Additionally, it should be lightly golden on top.
What can I serve with this casserole?
This casserole pairs well with fresh fruit, yogurt, or a light salad for a complete meal. You can also enjoy it with a drizzle of hot sauce for an extra kick!
That’s a Wrap
This Healthy Breakfast Casserole with Spinach and Feta is not only a delicious way to start your day, but it also offers an abundance of nutrients and flavors. With its ease of preparation and storage, it’s perfect for anyone looking to enjoy a wholesome breakfast without spending hours in the kitchen. Whether you’re making it for a busy weekday or a leisurely weekend brunch, this casserole is bound to become a staple in your breakfast rotation.
The combination of creamy feta, vibrant spinach, and fluffy eggs creates a dish that is both satisfying and nourishing. So gather your ingredients, follow the steps, and indulge in this delightful casserole that truly embodies a healthy start to your day!

Healthy Breakfast Casserole with Spinach and Feta
Ingredients
Equipment
Method
- Step 1: Preheat your oven to 350°F (175°C).
- Step 2: In a skillet, heat 1 teaspoon of olive oil over medium heat. Add the chopped shallots and sauté for about 3-4 minutes until translucent.
- Step 3: Add the baby spinach to the skillet and cook until wilted, about 2-3 minutes. Remove from heat and let cool slightly.
- Step 4: In a large mixing bowl, whisk together the beaten eggs, milk, and heavy cream. Season with kosher salt and black pepper.
- Step 5: Add the cooked shallots and spinach to the egg mixture. Fold in the crumbled feta, chopped scallions, and diced tomatoes.
- Step 6: Lightly spray your baking dish with olive oil spray. Pour the egg mixture into the prepared dish.
- Step 7: Place in the preheated oven and bake for 40-45 minutes until the casserole is set and lightly golden on top.
- Step 8: Let cool for a few minutes, cut into squares, and serve warm.
Notes
- Thoroughly beat the eggs for a fluffy texture.
- Do not overcrowd the skillet when sautéing.
- Let the casserole cool slightly before cutting.
