Make-Ahead Mediterranean Spinach Breakfast Bake
This Mediterranean spinach feta breakfast casserole is built on a foundation of sun-dried tomatoes, garlic, and crispy-edged, cheese-soaked English muffins. You can assemble the entire dish on a Friday night and wake up to a breakfast that is ready for the oven.
Getting the Greens Right
Most egg casseroles go wrong before they even hit the oven. If you just thaw frozen spinach and dump it in, the custard turns into a watery sponge. You have to squeeze it dry in a kitchen towel first.
Then, add it to the skillet with your hot onions. Stirring the greens over medium heat for two minutes evaporates any hidden moisture.
And right before that, you add the sun-dried tomatoes to the hot garlic oil. It immediately makes your kitchen smell like a Sunday dinner.
Melting the Cheese Base
Stirring cold cream cheese into crumbled feta usually leaves you with stubborn lumps. I found a way around this.
Move about half a cup of the hot vegetable mixture into your bowl with the cream cheese. The residual heat from the skillet melts everything into a smooth, savory paste. Once that happens, whisking in the eggs and milk is effortless.
The Assembly and Bake
This is where the English muffins come in. Spread that creamy cheese mixture onto the cut sides of the muffins. Place them cheese-side down right into the egg mixture.
Cover the dish tightly with aluminum foil for the first 25 minutes of baking. If you skip the foil, the exposed feta on top will burn long before the center sets. Pull the foil off, sprinkle the rest of the cheese, and let it finish until it no longer jiggles.
What to Serve Alongside
This bake is rich and savory, so it pairs beautifully with something light. If I am serving this for a weekend brunch, I usually toss together a quick Mediterranean salad to cut through the richness.
If you are making this for a busy weekday, blend up a Mediterranean smoothie while the bake is in the oven.
Make-Ahead & Storage Guidelines
- To Make Ahead: Assemble everything through the egg-pouring step, cover it tightly, and keep it in the fridge overnight. Let it sit on the counter while your oven preheats the next morning.
- To Store: Keep leftover slices in an airtight container for up to four days.
- To Reheat: A microwave works, but popping a slice in the air fryer or toaster oven brings the edges of the muffins back to life.
Mediterranean Spinach & Feta Breakfast Bake
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour 15 minutes (includes resting time)
- Yield: 6 servings (1 English muffin square per serving) 1x
- Category: Breakfast
- Method: Baking
- Cuisine: American-Mediterranean
Description
This hearty, savory casserole brings the flavors of a favorite Greek omelet into an easy-to-slice breakfast bake. By swapping heavy cream for milk and relying on the robust flavors of sun-dried tomatoes and garlic, this version stays rich and satisfying. It features whole grains and high-quality proteins, making it a delicious way to start the morning, and the leftovers reheat beautifully for busy weekdays.
Ingredients
The Savory Vegetable Base
- 1 (10-ounce) package frozen chopped spinach, thawed and squeezed very dry
- 1 small yellow onion, finely diced
- ½ cup sun-dried tomatoes packed in oil, drained well and chopped
- 1 tablespoon extra-virgin olive oil
- 1 tablespoon garlic, minced (fresh or jarred)
The Cheesy Layers
- 3 whole-wheat English muffins, split in half (6 halves total)
- 6 ounces reduced-fat cream cheese, softened to room temperature
- 1 cup feta cheese, crumbled (divided use)
The Egg Custard
- 12 large eggs
- 1 cup 1% or 2% milk
- ½ teaspoon ground black pepper, divided
- ¼ teaspoon salt
- ¼ teaspoon crushed red pepper flakes (optional, for a gentle kick)
- 1 pinch ground nutmeg (optional, adds depth to the spinach)
Instructions
- Prep the oven and dish: Preheat your oven to 350°F. Spray a 9×13-inch baking dish generously with nonstick cooking spray and set it aside.
- Sauté the aromatics: In a large skillet, heat the olive oil over medium heat. Toss in the diced onion and cook for about 3-4 minutes until it becomes soft and translucent. Stir in the chopped sun-dried tomatoes and minced garlic, cooking for just another 30 seconds until fragrant.
- Finish the vegetables: Add the dried spinach to the skillet. Cook while stirring frequently for 1-2 minutes to evaporate any lingering moisture. Remove the pan from the heat.
- Mix the spread: Transfer roughly ½ cup of the hot spinach mixture into a medium mixing bowl. Add the softened cream cheese, ¾ cup of the crumbled feta, and ¼ teaspoon of black pepper. Stir vigorously with a spatula until the heat from the veggies helps blend everything into a smooth, savory paste.
- Whisk the custard: In a large bowl, whisk together the eggs, milk, the remaining spinach mixture from the skillet, salt, crushed red pepper, nutmeg (if using), and the remaining ¼ teaspoon black pepper until fully combined.
- Assemble the bake: Pour the egg mixture directly into your prepared baking dish. Spread the cream cheese mixture generously over the cut sides of the 6 English muffin halves. Place the muffins, cheese-side down, into the egg mixture in the baking dish (arrange them in 2 rows of 3).
- Bake covered: Cover the dish tightly with aluminum foil. Bake for 25 minutes.
- Finish and serve: Remove the foil. Sprinkle the remaining ¼ cup of feta cheese over the top between the muffins. Return to the oven (uncovered) and bake for another 15 to 18 minutes, or until the eggs are set in the center and no longer jiggle. Let the casserole rest for 10 minutes to firm up before slicing.
Notes
- Allergy Alert: This recipe contains eggs, wheat/gluten, and dairy. For a gluten-free version, substitute with certified gluten-free English muffins (check carb counts as they may vary).
- Make-Ahead Tip: You can assemble the entire dish the night before (through Step 6), cover, and refrigerate. When ready to bake, let it sit on the counter while the oven preheats and add about 5-10 minutes to the covered baking time.
Nutritional Information (per 1/6th of casserole): Calories: 411 | Total Fat: 23g (Saturated: 10g) | Cholesterol: 415mg | Sodium: 680mg | Total Carbs: 24g (Fiber: 4g, Sugars: 4g) | Net Carbs: 20g | Protein: 24g | Vitamin A: 35% DV | Calcium: 25% DV.
These are approximate estimates based on standard nutritional data. Values may vary based on brands, exact measurements, and specific ingredients. For precise calculations, use a nutrition tracking app like MyFitnessPal or consult a reliable database.
I am a researcher and home cook, not a doctor. The nutrition numbers above are standard database estimates, so please consult your own medical team if you track macros closely for a specific condition.
Kristina Hanson is an independent wellness researcher and the founder of DailyZests. She specializes in translating nutritional science into simple, delicious recipes that fit into real life. When she isn’t in the kitchen, you’ll find her hiking the trails or enjoying a slow morning coffee with her Golden Retriever, Barnaby. Read her full story.
