Name: Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Cuisine: French
Ingredients: 5 eggs; 1 cup whole milk; 8 ounces sliced mushrooms; 1/2 medium yellow onion, minced; 3 large cloves garlic, minced; 2 cups packed baby spinach leaves; 4 ounces Fontina cheese or mozzarella, cubed; 1 tablespoon extra virgin olive oil, plus more for the pan; 1 teaspoon dried thyme; 1 teaspoon kosher salt; 1/2 teaspoon black pepper; 1 1/2 tablespoons balsamic vinegar

Jump to Recipe· 3.9 from 37 reviews

If you are looking for a delightful and wholesome dish that combines hearty vegetables with creamy richness, this Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe is an absolute winner. Perfect for breakfast, lunch, or a light dinner, it features tender spinach and earthy mushrooms harmoniously blended with the nutty goodness of Fontina cheese, all wrapped in a custardy egg base without the hassle of a crust. Whether you are gluten-free, vegetarian, or simply craving a flavorful meal that feels indulgent but is surprisingly light, this quiche will quickly become one of your new favorites.

Ingredients You'll Need

The image shows various cooking ingredients arranged neatly on a beige cutting board and a white marbled surface. There are five whole eggs in a white bowl with a blue rim on the top right, next to a small white bowl with salt and pepper. To the right is a large white bowl filled with sliced brown mushrooms. Below it is a blue bowl full of fresh green spinach leaves. In the center is a small bowl with finely chopped onions and another small bowl with chopped garlic. On the cutting board, there is a block of pale yellow cheese with two cubes cut from it and a knife with an orange handle. Around these are small cups containing dark red liquid, golden olive oil, yellow-green dried herbs, and a white pitcher filled with milk. The setting is simple, clean, and bright. Photo taken with an iphone --ar 4:5 --v 7

Each ingredient in this Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe is chosen to make the flavors shine without complicating the cooking process. From the fresh vegetables that provide vibrant color and texture, to the cheese that adds creamy depth, every component plays an essential role.

5 eggs: The foundation of the quiche, giving it that smooth and silky custard texture.
1 cup whole milk: Adds richness and moisture for the perfect creamy consistency.
4 ounces Fontina cheese (or mozzarella): Offers a nutty, mellow finish that melts beautifully throughout.
1 tablespoon extra virgin olive oil, plus more for the pan: Used to sauté the veggies and prevent sticking while adding a subtle fruity note.
8 ounces sliced mushrooms: Impart an earthy, meaty flavor profile that balances the freshness of spinach.
½ medium yellow onion, minced: Provides sweetness and depth when caramelized.
3 large cloves garlic, minced: Adds a fragrant kick that complements the mushrooms and spinach.
1 teaspoon dried thyme: Enhances the herbal aroma and ties the flavors together.
1 teaspoon kosher salt: Brings out all the flavors perfectly without overpowering the dish.
½ teaspoon black pepper: Gives a gentle heat and seasoning balance.
1 ½ tablespoons balsamic vinegar: Brightens the vegetables with a hint of acidity and sweetness.
2 cups packed baby spinach leaves: Adds vibrant green color and a nutritious boost, wilting down into silky softness.

How to Make Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe

Step 1: Preheat and Prepare Your Pan

Start by preheating your oven to 375°F. While it warms up, take a 9-inch pie plate and brush it lightly with olive oil to prevent sticking. Placing the pie plate on a baking sheet will make it easier to handle and catch any drips during baking, keeping your oven clean and the quiche easy to transfer.

Step 2: Whisk the Eggs and Prepare the Cheese

In a large mixing bowl, vigorously whisk together the eggs and whole milk until the mixture is smooth and slightly frothy. This ensures a light, fluffy texture in your quiche. Next, cube the Fontina cheese into bite-sized pieces and set aside; when melted, these delightful little pockets of cheese will add bursts of flavor throughout the quiche.

Step 3: Sauté the Vegetables

Heat a large skillet over medium-high heat and add your tablespoon of olive oil. Once it shimmers, toss in the sliced mushrooms, minced onion, and garlic. Sprinkle with thyme, kosher salt, and black pepper. Cook everything until the mushrooms shrink and the onions turn translucent, about 10 to 15 minutes depending on size. Drizzle the balsamic vinegar over the vegetables and stir for 1 to 2 more minutes to enhance their flavor. Finally, add the packed baby spinach leaves and cook until they just wilt, around 3 minutes. Taste and adjust the seasoning as needed to make sure every bite is well balanced.

Step 4: Assemble Your Quiche

Transfer the cooked vegetables evenly into your prepared pie dish. Sprinkle the cubed Fontina cheese on top of the vegetable layer. Pour the egg and milk mixture carefully over the filling, filling the dish close to the rim. This ensures a lovely, full quiche that bakes evenly and looks inviting.

Step 5: Bake to Perfection

Place your baking sheet with the quiche into the preheated oven and bake for about 35 minutes, or until the center is set and slightly golden on top. Once done, allow the quiche to cool at room temperature for about 10 minutes before slicing and serving. This resting time helps the quiche hold its shape and improves flavor melding.

How to Serve Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe

A white ceramic pie dish holds a golden-brown frittata filled with three visible layers: the top layer is a mix of browned mushroom slices and green spinach leaves scattered unevenly, the middle layer is soft and creamy pale yellow eggs mixed with herbs, and the bottom layer is a slightly firm egg base with some mushrooms visible at the edges; one wedge of the frittata is being lifted by a spatula with a wooden handle, showing the thick, fluffy texture from the side, all set on a white marbled surface with a striped cloth in warm colors behind it photo taken with an iphone --ar 4:5 --v 7

Garnishes

A well-garnished quiche elevates any meal. Freshly chopped parsley or chives add a pop of color and brightness. A light sprinkling of flaky sea salt over the top just before serving not only enhances the texture but also intensifies the savory notes of the Fontina cheese and vegetables.

Side Dishes

Pair this crustless spinach and mushroom quiche with a crisp green salad dressed in lemon vinaigrette to add freshness and crunch. Roasted cherry tomatoes or a simple cucumber salad provide a refreshing counterpoint to the creamy richness of the quiche, making for a well-rounded meal perfect for any time of day.

Creative Ways to Present

For brunch gatherings, cut the quiche into neat wedges and serve on colorful plates alongside small bowls of fruit preserves or spicy mustard. Layering individual portions with a dollop of sour cream or crème fraîche and a sprinkle of freshly cracked black pepper makes each slice feel special and luxurious.

Make Ahead and Storage

Storing Leftovers

Any leftover Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe can be stored in an airtight container in the refrigerator for up to 3 days. Cover well to preserve moisture; this way, it stays soft and luscious without drying out.

Freezing

You can freeze this quiche by wrapping it tightly in plastic wrap and then aluminum foil. It freezes beautifully for up to 2 months. When ready to enjoy, thaw overnight in the refrigerator to ensure it reheats evenly and maintains its delicious texture.

Reheating

The best way to reheat the quiche is in a preheated oven at 350°F for 15 to 20 minutes, or until warmed through. This method keeps the outside crisp and the inside soft without making it rubbery. You can also reheat slices gently in the microwave, but be cautious to avoid overcooking.

FAQs

Can I use a different cheese instead of Fontina?

Absolutely! While Fontina cheese offers a lovely nutty flavor and melts beautifully, mozzarella is a great substitute if you want a milder taste. Gruyère or Swiss cheese also works well in this crustless quiche recipe, adding their own distinct characters.

Is this quiche suitable for a gluten-free diet?

Yes, this is naturally gluten-free since it does not have a crust. Just be sure that any additional ingredients or sides you serve alongside are also gluten-free if you are cooking for someone with gluten sensitivities.

Can I add more vegetables to the quiche?

Definitely! This Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe is very versatile. Feel free to add roasted red peppers, broccoli florets, or even thinly sliced potatoes. Just adjust cooking times to ensure everything is tender.

How do I ensure the quiche is cooked perfectly?

Look for a set center that is slightly springy to the touch and a lightly golden top. If you gently jiggle the pan and the custard doesn’t move, it’s ready. Avoid overbaking to keep the texture creamy rather than rubbery.

Can this quiche be made ahead for a party?

Yes! This is a fantastic make-ahead dish. You can prepare and bake the quiche a day before your event, keep it refrigerated, and then gently rewarm it just before serving. It’s a crowd-pleaser that saves you time on the big day.

Final Thoughts

This Crustless Spinach and Mushroom Quiche with Fontina Cheese Recipe is truly one of those comforting dishes that feels like a warm hug on a plate. It's simple to prepare, packed with fresh ingredients, and endlessly adaptable to whatever you have on hand. I wholeheartedly encourage you to give it a try—it’s sure to brighten up your mealtime with its rich flavors and satisfying texture while keeping things light and wholesome.