Easy Feta and Spinach Casserole

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Creamy, cheesy, and loaded with leafy greens, this Easy Feta and Spinach Casserole is the kind of weeknight wonder that’s both comforting and surprisingly wholesome. It’s a family favorite for good reason—layers of savory spinach blend beautifully with tangy feta and a golden, cheesy top that melts in your mouth. Perfect as a side dish or even a main course with a fresh salad, it delivers big flavor with minimal effort.

Whether you’re cooking for a crowd or meal-prepping for the week, this casserole is a reliable go-to. It reheats like a dream and satisfies even the pickiest eaters. Plus, it’s naturally low-carb and packed with protein and iron, making it an excellent choice for those looking for a nutritious, no-fuss meal.

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Preparation Phase & Tools to Use

To get started on your Easy Feta and Spinach Casserole, having the right tools will make the process smooth and efficient:

• Mixing Bowl: A large bowl is crucial for combining the spinach, eggs, cheese, and seasonings evenly. A glass or stainless steel bowl is ideal for easy cleaning and non-reactive mixing.
• Whisk or Fork: Needed to beat the eggs and ensure they are well-incorporated into the mix.
• 9×13-inch Baking Dish: The perfect size for evenly cooking the casserole and achieving those crispy edges while keeping the center moist.
• Oven: Preheating is essential to get an even bake. Make sure your oven is at the right temperature before inserting your dish.
• Strainer (if using frozen spinach): To squeeze out excess moisture and avoid a watery casserole.
• Rubber Spatula: Great for transferring the mixture into the dish and spreading it out evenly.

These simple tools ensure your casserole bakes evenly, holds its shape, and tastes as good as it looks. Now that you’re equipped, it’s time to gather the ingredients!

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Ingredients for the Easy Feta and Spinach Casserole

Each ingredient in this recipe brings something essential to the table:

• Frozen Chopped Spinach: The star of the show—rich in iron and fiber, this adds the hearty green base. Make sure it’s well-drained to prevent excess moisture.
• Feta Cheese: Crumbly and tangy, feta gives the casserole its signature flavor punch.
• Eggs: These bind everything together and provide protein, giving the casserole its custard-like texture.
• Cottage Cheese or Ricotta: Adds creaminess and balances the saltiness of the feta. Either can be used based on your preference.
• Mozzarella Cheese: Melts beautifully and gives that golden-brown cheesy topping.
• Garlic (minced): For a subtle aromatic depth that enhances the spinach.
• Onion (finely diced): Adds a savory undertone and a bit of texture.
• Olive Oil: Used for sautéing and adds healthy fats.
• Salt & Pepper: To taste, and essential for bringing all the flavors together.
• Nutmeg (optional): A small pinch adds a warm note that complements spinach beautifully.

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How To Make the Easy Feta and Spinach Casserole

Step 1: Prep the Spinach

If you’re using frozen spinach, thaw it completely and use a strainer or cheesecloth to squeeze out all the excess moisture. This is crucial to avoid a soggy texture.

Step 2: Sauté Aromatics

In a skillet, heat a drizzle of olive oil and sauté the diced onion until translucent. Add the minced garlic and cook for another minute until fragrant. Let this cool slightly before adding it to the mix.

Step 3: Mix the Base

In a large mixing bowl, combine the drained spinach, crumbled feta, cottage or ricotta cheese, sautéed onion and garlic, and a pinch of nutmeg if using. Crack in the eggs and mix well until everything is evenly incorporated. Season with salt and pepper.

Step 4: Pour and Top

Grease your 9×13-inch baking dish lightly. Pour the mixture in and spread it out evenly using a rubber spatula. Sprinkle the mozzarella cheese generously on top for that melt-in-your-mouth finish.

Step 5: Bake It Up

Place the dish in a preheated oven at 375°F (190°C) and bake for 35-40 minutes, or until the top is golden brown and the center is set. Let it rest for 10 minutes before slicing.

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Best Way to Serve and Store Your Easy Feta and Spinach Casserole

This casserole is incredibly versatile when it comes to serving. It can be sliced into squares and served hot straight out of the oven or allowed to cool slightly for cleaner cuts—perfect for brunches, potlucks, or weeknight dinners. Pair it with a side salad, roasted vegetables, or warm bread for a complete and satisfying meal.

Storing leftovers is a breeze. Once cooled, cover the baking dish tightly or transfer slices to an airtight container. It keeps well in the refrigerator for up to 4 days. To reheat, simply pop a slice in the microwave or oven until warmed through. You can also freeze individual portions for longer storage—just wrap them tightly in plastic wrap and foil, then freeze for up to 2 months.

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Frequently Asked Questions

What kind of feta works best?

Use a good-quality block feta in brine for the creamiest, tangiest result. Pre-crumbled feta tends to be drier and less flavorful.

Can I use fresh spinach instead of frozen?

Absolutely. Just make sure to cook it down and squeeze out the moisture thoroughly before mixing it in.

Is this casserole gluten-free?

Yes! This recipe is naturally gluten-free—no flour or breadcrumbs required.

Can I make this ahead of time?

Yes, you can assemble the entire casserole a day in advance and store it covered in the fridge. Just bake it when you’re ready to serve.

What’s a good substitute for cottage cheese?

Ricotta cheese works beautifully in place of cottage cheese and provides a similarly creamy texture.

How do I know when it’s fully baked?

The center should be set and not jiggly. A knife inserted in the middle should come out clean, and the top will be golden brown.

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Want More Casserole Ideas?

If this Easy Feta and Spinach Casserole hit the spot, you’ll love trying these other cozy favorites:

• Million Dollar Ravioli Casserole for creamy, cheesy indulgence.
• Chicken Cordon Bleu Casserole with a savory twist on a classic dish.
• Mexican Cornbread Casserole for bold and spicy flavors.
• Cheesy Pizza Tater Tot Casserole for a kid-friendly dinner idea.
• Scalloped Corn Casserole that’s perfect for holidays or any hearty meal.

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Save This Recipe for Later

📌 Save this recipe to your Pinterest casserole board so you can come back to it any time: Life With Olivia on Pinterest

And let me know in the comments how your casserole turned out! Did you try adding fresh herbs or swap in a different cheese?

I love hearing how you make these recipes your own. Feel free to drop your questions too—let’s make cooking fun and flexible together.

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