Baked Vegetable Quiche

Baked Vegetable Quiche is a simple, colorful, and satisfying dish made with fluffy eggs, creamy milk, melted cheese, spinach, and sweet bell peppers. It comes together easily and makes a delicious option for breakfast, brunch, lunch, or a light dinner.

This crustless vegetable quiche is packed with comforting flavors while keeping the preparation simple. Serve it warm with a fresh salad, roasted potatoes, or your favorite breakfast sides.

Prep Time: 15 minutes
Cook Time: 35–40 minutes
Total Time: 50–55 minutes
Servings: 6

Ingredients

Egg Mixture

Large eggs: 6

Milk or heavy cream: ½ cup

Shredded cheese: 1 cup, such as mozzarella, cheddar, or Gruyère

Vegetable Mix-Ins

Chopped spinach: 1 cup

Diced bell peppers: ½ cup, red, yellow, or green

Onion: ¼ cup, finely chopped, optional

Mushrooms: ½ cup, finely chopped, optional

Fresh basil or chives: 1–2 tablespoons, chopped, optional

Seasonings

Salt: To taste

Freshly ground black pepper: To taste

Garlic powder: A pinch, optional

Ground nutmeg: A pinch, optional

Instructions

Prepare the Oven and Baking Dish

Preheat the oven to 375°F (190°C). Lightly grease a 9-inch pie dish or similar baking dish with cooking spray, butter, or a little olive oil.

For easier serving, make sure the bottom and sides are evenly coated.

Prepare the Vegetables

If using fresh spinach, roughly chop it. If using frozen spinach, thaw it completely and squeeze out as much excess water as possible.

Dice the bell peppers into small, even pieces. If using onions or mushrooms, chop them finely so they blend naturally into the egg mixture.

For extra flavor, sauté the onion, mushrooms, and bell peppers in a small amount of olive oil for a few minutes before adding them to the quiche. Allow the vegetables to cool slightly.

Whisk the Eggs

Crack the eggs into a large mixing bowl. Add the milk or heavy cream, salt, black pepper, and optional garlic powder or nutmeg.

Whisk until the eggs and dairy are completely combined and the mixture looks smooth and lightly frothy.

Avoid over-whisking, as too much air can cause the quiche to puff dramatically and then sink after baking.

Add the Cheese and Vegetables

Stir the shredded cheese into the egg mixture, reserving a small amount for the top if desired.

Add the spinach, bell peppers, and any optional onions, mushrooms, or fresh herbs. Stir gently until the vegetables are evenly distributed.

Fill the Baking Dish

Pour the mixture into the prepared baking dish. Spread the vegetables evenly with a spoon so that each portion will contain a good balance of eggs, cheese, and vegetables.

If desired, sprinkle the remaining cheese over the top.

Bake the Quiche

Place the dish in the preheated oven and bake for approximately 35–40 minutes.

The quiche is ready when the edges are set, the center is mostly firm with only a slight gentle wobble, and the top is lightly golden.

Avoid overbaking because the eggs can become firm and rubbery.

Rest Before Serving

Remove the quiche from the oven and allow it to rest for about 5–10 minutes before slicing.

This short resting period helps the eggs finish setting and makes the quiche easier to cut cleanly.

Serve warm or at room temperature with fresh herbs sprinkled over the top.

Tips

Remove Excess Moisture

Vegetables contain a lot of water, especially spinach and mushrooms. Removing excess moisture helps prevent a watery quiche and keeps the egg mixture creamy.

Use Freshly Shredded Cheese

Freshly shredded cheese melts more smoothly than many pre-shredded varieties. Mozzarella creates a mild, stretchy texture, while cheddar or Gruyère adds a stronger flavor.

Do Not Overfill the Dish

Leave a little room at the top of the baking dish because the eggs will puff slightly while baking.

Cook Dense Vegetables First

If adding mushrooms, onions, or larger amounts of peppers, briefly sauté them before mixing them into the eggs. This improves their texture and removes excess moisture.

Check the Center

The center should have a slight wobble when the quiche first comes out of the oven. It will continue to set as it rests.

Let It Rest

Cutting the quiche immediately can cause the slices to fall apart. Allowing it to rest for several minutes produces cleaner slices.

Avoid Excessive Baking

Egg-based dishes become tougher when overcooked. Remove the quiche once the center is just set rather than waiting for it to become completely firm in the oven.

Variations

Add Mushrooms and Herbs

Sautéed mushrooms with fresh chives or basil create a savory and aromatic variation. Make sure the mushrooms are cooked until their excess moisture has evaporated.

Make a Cheddar Spinach Quiche

Use sharp cheddar instead of mozzarella for a richer, more pronounced cheese flavor. Spinach pairs particularly well with cheddar.

Try Mediterranean Flavors

Add crumbled feta, chopped olives, tomatoes, and oregano for a Mediterranean-inspired version.

Add More Vegetables

Broccoli, zucchini, asparagus, roasted red peppers, or finely chopped kale can be added. Cook vegetables with high moisture content first for the best texture.

Make It Extra Creamy

Use heavy cream instead of milk for a richer, softer texture. You can also use a combination of milk and cream.

Make Mini Quiches

Divide the mixture among greased muffin tins and reduce the cooking time. Mini vegetable quiches are convenient for breakfast, brunch, or meal preparation.

Q&A

Can I make this quiche without a crust?

Yes. This recipe is naturally crustless, making it quick and easy to prepare while still producing a satisfying baked egg dish.

Can I use frozen spinach?

Yes. Thaw the spinach completely and squeeze out as much water as possible before adding it to the egg mixture.

Can I make this quiche ahead of time?

Yes. Bake it ahead, allow it to cool, and refrigerate it. Reheat individual portions gently or serve it at room temperature.

What cheese is best for vegetable quiche?

Mozzarella, cheddar, and Gruyère all work well. Mozzarella gives a mild flavor, cheddar adds sharpness, and Gruyère provides a rich, nutty taste.

Why is my quiche watery?

Excess moisture from spinach, mushrooms, zucchini, or other vegetables can make a quiche watery. Cook moisture-rich vegetables first and drain them well before adding them.

How should I store leftover quiche?

Store leftover quiche covered in the refrigerator. Reheat individual slices gently in the oven or microwave before serving.

Nutrition

Approximate nutrition per serving:
Calories: 245 kcal
Protein: 16 g
Carbohydrates: 6 g
Fat: 18 g
Saturated Fat: 8 g
Fiber: 1 g
Sugar: 3 g
Sodium: 360 mg
Calcium: 250 mg

Nutrition values are estimates and can vary depending on the cheese, dairy, vegetables, and portion sizes used.

Conclusion

This Baked Vegetable Quiche is an easy way to turn everyday ingredients into a flavorful and satisfying meal. Creamy eggs, melted cheese, spinach, and colorful bell peppers create a delicious combination that works beautifully at any time of day.

Whether served for a weekend brunch or prepared ahead for busy mornings, this versatile quiche is simple, comforting, and easy to customize with your favorite vegetables and herbs.