Classic Spinach & Mushroom Crustless Quiche

Description

Classic Spinach & Mushroom Crustless Quiche is a savoury, creamy, and satisfying egg dish loaded with tender spinach, golden mushrooms, melted cheese, and fragrant herbs. Because it skips the traditional pastry crust, this quiche is simple to prepare while still delivering all the comforting flavours of a classic baked quiche.

The combination of earthy mushrooms, fresh spinach, eggs, and cheese creates a beautifully balanced dish that works for breakfast, brunch, lunch, or a light dinner. It can be prepared ahead of time and served warm, at room temperature, or chilled, making it especially convenient for busy mornings and meal preparation.

The crustless format also makes the recipe naturally lower in carbohydrates than traditional quiche. You can customise it with different cheeses, herbs, vegetables, or additional protein depending on what you have available.

Serve a slice with a fresh green salad, roasted vegetables, fresh fruit, or a spoonful of yoghurt for a complete and satisfying meal.

Ingredients

For the Quiche

8 large eggs

1 cup milk

1/2 cup heavy cream or half-and-half

2 cups fresh spinach, roughly chopped

8 ounces mushrooms, sliced

1 cup shredded cheddar cheese

1/2 cup shredded mozzarella cheese

1/2 medium yellow onion, finely chopped

2 cloves of garlic, minced

1 tablespoon olive oil or butter

1/2 teaspoon salt

1/2 teaspoon black pepper

1/2 teaspoon Italian seasoning

1/4 teaspoon paprika

1/4 teaspoon nutmeg, optional

2 tablespoons fresh parsley, chopped

1/4 cup grated Parmesan cheese, optional

Optional Additions

1/2 cup diced bell pepper

1/3 cup crumbled feta cheese

1/2 cup cooked turkey sausage

1/2 cup cooked bacon, chopped

1/2 cup cherry tomatoes, halved

A pinch of red pepper flakes

Instructions

1. Preheat the Oven

Preheat your oven to 375°F (190°C).

Lightly grease a 9-inch or 10-inch pie dish or baking dish with olive oil, butter, or nonstick cooking spray.

Greasing the dish well is important because the egg mixture can stick as it bakes.

For easier cleanup, you can also line the bottom of the dish with parchment paper, although this is optional.

2. Prepare the Mushrooms

Heat a large skillet over medium heat and add the olive oil or butter.

Add the chopped onion and sliced mushrooms.

Cook for approximately 5–7 minutes, stirring occasionally.

The mushrooms will initially release moisture. Continue cooking until most of that moisture has evaporated and the mushrooms begin to develop a golden-brown colour.

This step is important because adding raw mushrooms directly to the egg mixture can release excess water during baking and make the quiche watery.

3. Add the Garlic

Once the mushrooms have browned, add the minced garlic.

Cook for approximately 30–60 seconds, stirring constantly.

Be careful not to burn the garlic.

4. Add the Spinach

Add the chopped spinach to the skillet.

Cook for approximately 1–2 minutes, stirring gently, until the spinach wilts.

If using frozen spinach instead of fresh, thaw it completely and squeeze out as much excess water as possible before adding it.

Remove the skillet from the heat and allow the vegetables to cool slightly.

5. Prepare the Egg Mixture

In a large mixing bowl, crack the eggs.

Add the milk and heavy cream or half-and-half.

Whisk until the mixture is smooth and well combined.

Add salt, black pepper, Italian seasoning, paprika, and optional nutmeg.

Whisk again.

Nutmeg may seem unusual in a savoury egg dish, but a very small amount adds warmth and enhances the flavour of spinach and cheese.

6. Add the Cheese

Stir the shredded cheddar and mozzarella into the egg mixture.

Reserve a small amount of cheese for sprinkling over the top if desired.

If using Parmesan, feta, or another cheese, add it at this stage.

7. Combine the Ingredients

Add the sautéed mushrooms, onions, garlic, and spinach to the egg mixture.

Stir gently until the vegetables are evenly distributed.

Add the chopped fresh parsley.

Taste the mixture before pouring it into the baking dish if desired, remembering that the cheese and salt will become more pronounced during baking.

8. Fill the Baking Dish

Pour the egg and vegetable mixture into the prepared pie dish.

Spread the vegetables evenly across the surface.

Sprinkle the reserved cheese over the top.

Do not fill the dish all the way to the rim because the eggs will puff slightly as they bake.

9. Bake

Place the quiche in the preheated oven.

Bake for approximately 35–45 minutes, depending on the depth of your baking dish.

The centre should be set but still have a very slight jiggle when the dish is gently moved.

The top should be lightly golden and the edges should look firm.

Avoid overbaking because this can make the eggs rubbery and dry.

10. Rest Before Slicing

Remove the quiche from the oven and allow it to rest for 10–15 minutes before slicing.

This resting period allows the eggs to finish setting and makes the quiche easier to cut.

Garnish with additional fresh parsley before serving.

Notes

The quality of the mushrooms makes a noticeable difference in this recipe. White button mushrooms, cremini mushrooms, baby bella mushrooms, or a combination can be used.

Fresh spinach provides a bright flavour, but frozen spinach works well too. The most important step when using frozen spinach is removing excess moisture.

You can use whole milk, 2% milk, half-and-half, or a combination of milk and cream. More cream creates a richer and softer texture, while milk produces a lighter quiche.

Cheddar provides a classic savoury flavour, while mozzarella creates a stretchy, mild texture. Gruyère, Swiss cheese, Monterey Jack, feta, or Parmesan can also be used.

Because cheese already contains salt, taste your ingredients before adding too much additional salt.

If you want a deeper mushroom flavour, cook the mushrooms until they are nicely browned before adding the spinach.

Tips for the Best Crustless Quiche

Cook the vegetables first: Mushrooms and spinach contain water. Sautéing them before adding them to the eggs prevents excess moisture from making the quiche watery.

Don’t overbake: the quiche should be just set in the centre. Overcooking can result in a dry, rubbery texture.

Use room-temperature eggs: Room-temperature eggs mix more easily with the dairy and can help create a smoother custard.

Whisk thoroughly: Make sure the eggs, milk, cream, and seasonings are well combined.

Grease the dish generously: This makes serving and cleanup much easier.

Let it rest: Allowing the quiche to rest after baking helps it firm up and makes cleaner slices.

Don’t overload the vegetables: While adding extra vegetables is tempting, too many moisture-rich ingredients can affect the final texture.

Brown the mushrooms: Giving the mushrooms enough time to brown creates deeper, richer flavour.

Add fresh herbs at the end: Fresh parsley or chives provide a bright contrast to the creamy eggs and mushrooms.

Serving Suggestions

Serve this quiche warm for breakfast with fresh fruit, roasted potatoes, or avocado.

For brunch, pair it with a fresh tomato and cucumber salad, fruit salad, roasted asparagus, or whole-grain toast.

For lunch, serve a slice alongside a large green salad dressed with lemon juice and olive oil.

For dinner, pair it with roasted broccoli, green beans, asparagus, or a simple soup.

A spoonful of Greek yoghurt or a light herb sauce can also be served alongside the quiche.

Meal Prep

Classic Spinach & Mushroom Crustless Quiche is excellent for meal preparation.

Bake the quiche according to the recipe and allow it to cool completely.

Slice it into individual portions and store the pieces in airtight containers.

Refrigerate for up to 4 days.

For breakfast meal prep, pair each slice with fresh fruit, avocado, or a small salad.

To reheat, microwave individual slices for approximately 45–90 seconds, depending on your microwave. You can also reheat slices in a 325°F (165°C) oven until warmed through.

Freezing Instructions

The quiche can be frozen, although the texture may be slightly softer after thawing.

Allow the baked quiche to cool completely.

Cut it into individual slices and wrap each slice tightly in plastic wrap or place the slices in freezer-safe containers.

Freeze for up to 2 months for best quality.

Thaw overnight in the refrigerator before reheating.

For the best texture, reheat thawed slices in the oven rather than relying entirely on the microwave.

Servings

Makes approximately 6 servings.

Serving size: 1 slice.

Approximate Nutritional Information Per Serving

Calories: 285

Protein: 17 g

Carbohydrates: 6 g

Fat: 21 g

Saturated Fat: 9 g

Fibre: 1–2 g

Sugar: 3 g

Sodium: 480 mg

These nutritional values are estimates and will vary depending on the type of cheese, milk, cream, and other ingredients used.

Adding bacon, sausage, additional cheese, or heavy cream will increase the calorie and fat content.

Benefits

Protein-rich: Eggs, milk, and cheese provide protein that helps make the quiche satisfying and filling.

Provides choline: Eggs are a natural source of choline, an important nutrient involved in normal cell function.

Contains leafy greens: Spinach provides nutrients including vitamin K, folate, vitamin A, and several antioxidant compounds.

Mushroom nutrients: Mushrooms contribute B vitamins, minerals, and other beneficial compounds.

Calcium source: Dairy products and cheese provide calcium, which is important for maintaining normal bones and teeth.

Lower in carbohydrates: Because there is no pastry crust, this quiche contains fewer carbohydrates than many traditional crusted quiches.

Flexible nutrition: The recipe can easily be adjusted with additional vegetables or lean protein to suit different meal preferences.

Frequently Asked Questions

Can I use frozen spinach?

Yes. Thaw the spinach completely and squeeze out as much water as possible before adding it to the recipe. Excess moisture can make the quiche watery.

Can I make this quiche without cream?

Yes. You can use milk instead. The finished quiche will be slightly lighter and less rich.

What mushrooms work best?

Button mushrooms, cremini mushrooms, baby bella mushrooms, shiitake mushrooms, or a mixture can all be used.

Can I use a different cheese?

Absolutely. Gruyère, Swiss, feta, Monterey Jack, mozzarella, Parmesan, and goat cheese all work beautifully.

Why is my quiche watery?

The most common causes are excess moisture from vegetables or undercooking. Make sure the mushrooms are properly sautéed and spinach is well drained.

Can I add meat?

Yes. Cooked bacon, ham, turkey sausage, chicken, or lean ground meat can be added. Make sure any meat is fully cooked before adding it to the egg mixture.

Can I make this recipe dairy-free?

Yes. Use an unsweetened dairy-free milk and a suitable dairy-free cheese alternative. The texture may vary depending on the products used.

Can I make it ahead of time?

Yes. This quiche is excellent when prepared a day ahead. Store it covered in the refrigerator and gently reheat before serving, or serve it at room temperature.

Can I eat it cold?

Yes. Crustless quiche can be enjoyed warm, at room temperature, or cold depending on your preference.

How do I know when the quiche is done?

The edges should be set, the top should be lightly golden, and the centre should have only a slight jiggle. It will continue setting as it rests.

Can I add more vegetables?

Yes, but avoid adding too many water-rich vegetables. Bell peppers, broccoli, asparagus, zucchini, and tomatoes can be used if they are cooked first to remove excess moisture.

Can I make individual mini quiches?

Yes. Divide the mixture among greased muffin tins and reduce the baking time. Begin checking them around 18–22 minutes.

Can I make this without onions?

Yes. Simply omit the onion and increase the mushrooms or spinach slightly if desired.

How should I prevent sticking?

Grease the baking dish thoroughly with butter, olive oil, or cooking spray. A nonstick pie dish can also make removal easier.

Can I use egg whites instead of whole eggs?

Yes. Egg whites can be substituted for some or all of the whole eggs. However, using only egg whites will produce a lighter but less rich and creamy texture.

Final Thoughts

Classic Spinach & Mushroom Crustless Quiche is an easy, comforting recipe that brings together simple ingredients in a delicious and versatile dish. The combination of savoury mushrooms, tender spinach, creamy eggs, melted cheese, garlic, and herbs creates a satisfying meal without the need for a pastry crust.

It is perfect for breakfast, brunch, lunch, dinner, or meal prep, and it can easily be customised with your favourite vegetables, cheeses, herbs, or cooked protein.

For the best result, remember to cook the mushrooms and spinach before adding them to the egg mixture, avoid adding too much moisture, and take the quiche out of the oven as soon as the centre is just set. Let it rest before slicing for the cleanest pieces and creamiest texture.

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