Name: Spinach Mushroom Quiche
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 10 oz frozen chopped spinach, thawed and squeezed dry; 8 oz mushrooms, thinly sliced; 1 garlic clove, minced; 1/8 tsp salt; 1 Tbsp neutral cooking oil, divided; 2 oz feta cheese, crumbled; 4 large eggs; 1/4 cup grated Parmesan cheese; 1/4 tsp freshly cracked black pepper; 1 cup milk; 1/2 cup shredded mozzarella cheese

Jump to Recipe

Spinach Mushroom Quiche brings together tender mushrooms, garlicky spinach, creamy feta, fluffy eggs, and a golden mozzarella topping without the fuss of a pastry crust. Because this version skips the crust, it fits beautifully into a busy morning, a weekend brunch, or a make-ahead meal plan. It tastes rich and satisfying, yet it stays light enough for breakfast or lunch. Even better, this Spinach Mushroom Quiche uses simple grocery staples, so you can serve a flavorful homemade dish without spending much.

Story

I love a breakfast recipe that feels special but does not demand bakery-level effort, and Spinach Mushroom Quiche does exactly that. The first time I made a crustless version, I wanted something warm, filling, and easy to slice for several mornings. The mushrooms added savory depth, the feta brought a salty bite, and the spinach gave every slice a hearty vegetable base. Since then, Spinach Mushroom Quiche has become one of my favorite dishes for brunch, meal prep, and simple dinners with salad. This Spinach Mushroom Quiche also works well as a Feta Crustless Quiche because the cheese gives the egg filling bold flavor without needing a heavy crust.

Ingredients

Use 10 ounces frozen chopped spinach, thawed and squeezed very dry; 8 ounces mushrooms, thinly sliced; 1 garlic clove, minced; 1/8 teaspoon salt; 1 tablespoon neutral cooking oil, divided; 2 ounces feta cheese, crumbled; 4 large eggs; 1/4 cup grated Parmesan cheese; 1/4 teaspoon freshly cracked black pepper; 1 cup milk; and 1/2 cup shredded mozzarella cheese. You will also need a 9-inch glass or ceramic pie plate, a skillet, a mixing bowl, and a whisk.

Step-by-Step Instructions

This Spinach Mushroom Quiche comes together in three simple stages: remove moisture from the vegetables, build the egg mixture, and bake everything until the center sets. First, heat the oven to 350°F. Then thaw the spinach fully and squeeze out as much water as possible. Next, slice the mushrooms thinly and mince the garlic. Cook the mushrooms with garlic, salt, and half the oil until the liquid evaporates. After that, oil the pie plate, layer in the vegetables and feta, pour the egg mixture over the top, add mozzarella, and bake until golden.

Preparing the Ingredients

Start with the spinach because moisture control matters most in a crustless quiche. Place the thawed spinach in a clean kitchen towel or several layers of paper towels, then squeeze firmly until it feels compact and no longer drips. Next, rinse any dirt from the mushrooms, pat them dry, and slice them evenly so they cook at the same pace. Mince the garlic finely so it spreads through the filling instead of creating sharp bites. Finally, crumble the feta, grate the Parmesan, measure the milk, and crack the eggs into a large bowl so everything stays ready before cooking begins.

Cooking Instructions

Warm a skillet over medium heat, then add the sliced mushrooms, minced garlic, salt, and 1/2 tablespoon of oil. Cook while stirring often until the mushrooms release their liquid and the skillet turns dry again. Brush the remaining 1/2 tablespoon of oil inside a 9-inch pie plate. Layer the cooked mushrooms across the bottom, scatter the squeezed spinach over them, and sprinkle crumbled feta on top. Whisk the eggs, Parmesan, pepper, and milk until smooth, then pour the mixture into the pie plate. Add mozzarella over the top, bake for about 50 minutes, and serve once the center reaches 160°F.

Tips for Perfect Results

The best Spinach Mushroom Quiche depends on dry vegetables, the right pan size, and a gentle bake. Because spinach and mushrooms both hold water, you need to remove that extra liquid before the eggs go into the oven. Otherwise, the filling can turn loose instead of creamy and sliceable. A 9-inch glass or ceramic pie plate gives the quiche enough depth while helping the center cook evenly. Also, let the quiche rest for 5 to 10 minutes after baking, because that brief pause helps the slices hold their shape when you cut them.

Common Mistakes to Avoid

Do not add wet spinach straight from the package, and do not stop cooking the mushrooms while liquid still sits in the skillet. These two mistakes cause most watery quiche problems. Also, avoid using a pie plate that runs too small, since the egg mixture may overflow as it bakes. On the other hand, a very large dish creates a thinner Spinach Mushroom Quiche that cooks faster and may turn dry if you follow the same baking time. Finally, stick with large eggs because smaller or jumbo eggs can change the texture of the filling.

Pro Tips for Better Flavor

For deeper flavor, cook the mushrooms until they brown lightly after their moisture evaporates. That extra minute or two adds savory richness and makes the finished Spinach Mushroom Quiche taste more satisfying. You can also add a pinch of crushed red pepper, a little onion powder, or fresh dill if you like a brighter flavor. Whole milk gives the eggs a soft texture, while 2% milk also works well. For a Low Carb Breakfast, serve the quiche with sliced avocado, tomatoes, or a simple green salad instead of toast or potatoes.

Serving and Storage

Spinach Mushroom Quiche tastes delicious warm, at room temperature, or gently reheated, so it works for more than one meal. Serve it for breakfast with fruit, for brunch with roasted potatoes, or for lunch with a crisp salad. Because this recipe costs about $7.71 for the full dish and about $1.28 per serving, it makes a Budget Friendly Meal that still feels fresh and homemade. It also fits a Healthy Brunch menu because each slice brings vegetables, protein, and rich flavor in a simple, crustless format.

How to Serve

Slice the quiche into 6 wedges and use a thin spatula to lift each piece cleanly from the pie plate. For brunch, pair it with mixed greens, fresh berries, roasted tomatoes, or a bowl of fruit. For dinner, serve it next to a simple salad with vinaigrette or a cup of soup. Since Spinach Mushroom Quiche already includes eggs, cheese, and vegetables, you do not need much on the side. However, a little hot sauce or a spoonful of salsa adds a nice contrast if you enjoy extra brightness.

How to Store Leftovers

Cool leftovers completely, then place slices in an airtight container and refrigerate them for up to 4 days. To reheat, warm one slice in the microwave in short intervals until heated through, or place several slices in a 325°F oven until warm. The oven keeps the texture firmer, while the microwave works well for fast breakfasts. You can also freeze slices, although the texture may soften slightly after thawing. For best results, wrap each slice tightly, freeze for up to 2 months, thaw overnight in the refrigerator, and reheat gently.

Conclusion

Spinach Mushroom Quiche gives you a practical, flavorful recipe that works for busy mornings, weekend brunch, and easy meal prep. With tender spinach, savory mushrooms, salty feta, and a soft egg filling, every slice tastes hearty without feeling heavy. Since this crustless quiche uses affordable ingredients and simple steps, you can make it often without stress. Try it once, and it may become your go-to vegetable-packed breakfast bake.

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Frequently Asked Questions

Can I make Spinach Mushroom Quiche with fresh spinach?

Yes, you can use fresh spinach instead of frozen spinach. A 1-pound bag of fresh spinach cooks down to about the same amount as a 10-ounce package of frozen spinach. For best results, sauté the fresh spinach first so it wilts fully and releases its moisture. Then squeeze or press out any remaining liquid before adding it to the pie plate. This keeps the quiche creamy and sliceable instead of watery.

Can I make this crustless quiche ahead of time?

Yes, Spinach Mushroom Quiche works very well as a make-ahead recipe. You can bake the full quiche, cool it, cover it, and refrigerate it for up to 4 days. Then slice and reheat portions as needed. You can also cook the mushrooms, squeeze the spinach, and crumble the cheese one day ahead, then assemble and bake the quiche fresh the next morning.

How do I know when the quiche has finished baking?

The top should look golden, the edges should look set, and the center should no longer jiggle loosely. For the most accurate result, check the middle with an instant-read thermometer. The Spinach Mushroom Quiche should reach 160°F in the center. After baking, let it rest for 5 to 10 minutes so the filling settles and slices neatly.