Best Crustless Spinach, Onion, and Feta Quiche (5 Simple Steps!)

There’s something truly magical about a warm, savory quiche that comes together effortlessly—and this Crustless Spinach, Onion, and Feta Quiche is exactly that! Whether you’re looking for a quick breakfast, a satisfying brunch dish, or even a light dinner, this recipe checks all the boxes. The best part? No crust means fewer carbs, less fuss, and all the delicious flavors packed into every bite.

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Why You’ll Love This Crustless Quiche

• Easy to make – No rolling or blind-baking a crust. Just mix, pour, and bake!
• Nutritious & wholesome – Loaded with protein, vitamins, and healthy greens.
• Great for meal prep – Perfect for making ahead and reheating throughout the week.
• Naturally gluten-free – Ideal for those avoiding wheat or looking for a lower-carb option.

What Does This Crustless Spinach Quiche Taste Like?

This crustless quiche is a dream combination of creamy, cheesy, and herby goodness. The feta cheese brings a tangy, salty kick that pairs beautifully with the mild sweetness of sautéed onions and the earthiness of spinach. Mozzarella adds a smooth, melty texture, while dried basil and a touch of black pepper enhance every bite.

Ingredients You’ll Need

• 1 tbsp olive oil – For sautéing the onions and spinach
• 1 small onion, chopped – Adds a subtle sweetness and depth of flavor
• 2 cups fresh spinach, chopped – Or 1 ½ cups frozen spinach, thawed and drained
• 4 large eggs – The base that holds everything together
• 1 cup milk – Regular or plant-based milk for a creamy texture
• 1 cup crumbled feta cheese – Tangy and salty, giving this quiche its signature flavor
• ½ cup shredded mozzarella cheese – For extra cheesiness and a lovely melt
• ½ tsp dried basil – Adds a hint of earthy, aromatic flavor
• Salt and pepper, to taste – Enhances all the flavors
• 1 tbsp fresh parsley (optional) – A bright, fresh garnish

Kitchen Tools You’ll Need

• A 9-inch pie dish or baking dish
• A mixing bowl
• A whisk
• A skillet for sautéing the onions and spinach
• A spatula for stirring

Ingredient Substitutions & Additions

• Cheese Variations: Swap feta for goat cheese, ricotta, or even sharp cheddar
• Milk Alternatives: Use almond, oat, or coconut milk for a dairy-free version
• Extra Veggies: Add mushrooms, bell peppers, or cherry tomatoes for more color and flavor
• Protein Boost: Stir in cooked bacon or diced ham for a heartier meal

How to Make Crustless Spinach, Onion, and Feta Quiche

1. Prep and Sauté the Vegetables

Preheat your oven to 375°F (190°C). Heat the olive oil in a skillet over medium heat. Add the chopped onion and cook for about 3-4 minutes until soft and translucent.

Add the chopped spinach and cook for another 1-2 minutes, just until it wilts. If using frozen spinach, make sure it’s fully drained before adding it to the pan. Remove from heat and let cool slightly.

2. Mix the Egg Base

In a large bowl, whisk together the eggs, milk, dried basil, salt, and pepper. Stir in the crumbled feta and shredded mozzarella.

3. Assemble and Bake

Lightly grease your pie dish, then spread the sautéed onions and spinach evenly across the bottom. Pour the egg mixture over the top, making sure the ingredients are well distributed.

Bake for 35-40 minutes, or until the quiche is set and lightly golden on top. A knife inserted in the center should come out clean.

4. Let It Rest & Serve

Allow the quiche to cool for about 5-10 minutes before slicing. Garnish with fresh parsley if desired, and enjoy!

What to Serve with This Crustless Spinach Quiche

• Fresh green salad – A light arugula or mixed greens salad with a lemon vinaigrette
• Roasted potatoes – For a more filling brunch spread
• Crusty bread or toast – Perfect for scooping up every bite
• Fruit salad – A refreshing and slightly sweet contrast

Pro Tips for the Perfect Crustless Spinach Quiche

✔ Drain Your Spinach Well – If using frozen spinach, press out as much liquid as possible to prevent a watery quiche

✔ Use Room Temperature Eggs – They mix more easily and create a better texture

✔ Let It Cool Slightly Before Slicing – This helps the quiche set for cleaner slices

✔ Make It Ahead – Bake the quiche the night before and simply reheat in the morning

Storage & Reheating Instructions Crustless Spinach

• Fridge: Store leftovers in an airtight container for up to 4 days
• Freezer: Wrap individual slices in plastic wrap and freeze for up to 3 months
• Reheat: Warm in the microwave for 30-45 seconds or in a 300°F oven for 10 minutes

Frequently Asked Questions Crustless Spinach

Can I make this quiche dairy-free?

Yes! Use dairy-free milk and substitute the cheeses with plant-based alternatives.

How do I know when the quiche is fully cooked?

The quiche is done when the center is set and a knife inserted in the middle comes out clean.

Can I use a different size baking dish?

A 9-inch pie dish works best, but you can also use an 8×8-inch square dish—just adjust the baking time as needed.

Is this quiche keto-friendly?

Yes! Since it’s crustless, it’s naturally low in carbs and works well for a keto diet.

Final Thoughts

This Crustless Spinach, Onion, and Feta Quiche is a go-to recipe for busy mornings, weekend brunches, or even light dinners. It’s simple, wholesome, and packed with incredible flavor. Plus, it’s easy to customize with whatever you have on hand!

If you try this recipe, I’d love to hear how it turned out! Leave a review below, share a photo on Pinterest, and tag me—let’s see those delicious creations!

Looking for more easy and delicious recipes? Try these next:

• Cheesy Quick Bread – A savory, cheesy bread that pairs perfectly with quiche
• Cake Mix Coffee Cake – A sweet and simple coffee cake for a delightful brunch
• Blueberry Muffins – Soft, moist, and bursting with fresh blueberry flavor

Enjoy your quiche, and happy cooking! 😊

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