Name: Crustless Garden Vegetable Quiche Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Ingredients: 6 large eggs; 1 cup whole milk or half-and-half; 1/2 cup plain Greek yogurt or sour cream; 1 1/2 cups shredded cheese (such as Cheddar, Colby Jack, or a blend); 1 small yellow onion, finely diced; 1 small red bell pepper, diced; 1 small zucchini, diced; 1 cup broccoli florets, chopped small; 1 cup baby spinach, roughly chopped; 1 small tomato, seeded and diced (optional, for topping); 1 teaspoon kosher salt; 1/2 teaspoon black pepper; 1/2 teaspoon garlic powder; 1/2 teaspoon onion powder; 1/2 teaspoon dried Italian seasoning or dried thyme; 1 pinch red pepper flakes (optional); 1 tablespoon olive oil or avocado oil; 1 tablespoon butter; 2 tablespoons grated Parmesan cheese (optional, for topping)

Crustless Garden Vegetable Quiche Recipe tastes creamy, cheesy, and loaded with tender veggies in every bite, perfect for breakfast, brunch, or a light dinner in about 45 minutes. It suits busy home cooks who want something cozy, protein-packed, and veggie-forward without fussing with pie crust. I tested this on a Monday morning with bedhead and coffee in hand, so you know it fits real life.

Why Make This Crustless Garden Vegetable Quiche Recipe at Home

This crustless garden vegetable quiche recipe skips the pastry but keeps all the flavor, so you save time and cut back on extra carbs. You still get a golden, cheesy top, a custardy center, and plenty of colorful vegetables in every slice.

You control the ingredients, so you can load it with seasonal produce, use up fridge odds and ends, and adjust the cheese and seasoning to your taste. It works for meal prep, feels special enough for guests, and still counts as a “clean out the fridge” hero.

“This crustless garden vegetable quiche recipe tastes like a fancy café brunch that you whipped up in your own kitchen in under an hour.” ★★★★★

Ingredients You Need

Eggs and Dairy

6 large eggs
1 cup whole milk or half-and-half
- Use whole milk for a lighter texture.
- Use half-and-half for a richer, creamier quiche.
1/2 cup plain Greek yogurt or sour cream
- Greek yogurt adds extra protein and a slight tang.
- Sour cream gives a softer, richer custard.
1 1/2 cups shredded cheese
- Cheddar, Colby Jack, or a blend works great.
- Use pre-shredded cheese from a bag if you need a shortcut, but freshly shredded melts more smoothly.

Vegetables

Use about 2 to 2 1/2 cups total chopped vegetables.

1 small yellow onion, finely diced
1 small red bell pepper, diced
1 small zucchini, diced
1 cup broccoli florets, chopped small
1 cup baby spinach, roughly chopped
1 small tomato, seeded and diced (optional, for the top)

You can swap in:

Frozen spinach (thawed and squeezed dry)
Frozen broccoli (thawed and patted dry)
Mushrooms, sliced and sautéed
Asparagus, chopped small

Dry the vegetables well so the quiche sets nicely and does not turn watery.

Seasonings

1 teaspoon kosher salt
1/2 teaspoon black pepper
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
1/2 teaspoon dried Italian seasoning or dried thyme
Pinch of red pepper flakes (optional, for a little heat)

Adjust the salt if you use a very salty cheese.

Oil and Extras

1 tablespoon olive oil or avocado oil
1 tablespoon butter (for extra flavor when you sauté the vegetables)
2 tablespoons grated Parmesan cheese (optional, for sprinkling on top)

Equipment List

9-inch pie dish or 9-inch round baking dish
- A glass or ceramic dish works best for even baking.
Large skillet for sautéing vegetables
Large mixing bowl
Whisk
Cutting board and sharp knife
Measuring cups and spoons
Baking sheet to place under the pie dish (catches any drips and makes it easier to move)

Tips & Mistakes

Pre-cook vegetables until they soften and release moisture, or the quiche can turn soggy.
Chop vegetables small and evenly so they cook through at the same rate.
Squeeze thawed frozen spinach very dry, or it will water down the custard.
Use room temperature eggs and dairy for a smoother mixture and more even baking.
Whisk the egg mixture until fully combined, but do not whip air into it, or the quiche can puff too much and sink.
Grease the pie dish well so slices release cleanly.
Bake on the middle rack so the top browns and the center cooks through.
Check doneness by gently jiggling the center; it should look mostly set with a slight wobble, not liquid.
Let the quiche rest 10 to 15 minutes before slicing so it firms up and slices neatly.
Cool leftovers fully before covering, or condensation can make the top soggy.

How to Make Crustless Garden Vegetable Quiche Recipe

Step 1: Prep the Oven and Dish

Preheat the oven to 375°F. Grease a 9-inch pie dish with butter or cooking spray and set it on a baking sheet. This setup makes it easier to move the quiche in and out of the oven.

Step 2: Prep and Sauté the Vegetables

Chop the onion, bell pepper, zucchini, broccoli, and spinach into small, bite-size pieces. Heat the olive oil and butter in a large skillet over medium heat. Add the onion and bell pepper and cook 3 to 4 minutes until they soften.

Add the zucchini and broccoli and cook another 4 to 5 minutes until the vegetables turn tender and most of the moisture cooks off. Stir in the chopped spinach and cook 1 to 2 minutes until it wilts. Taste the vegetables and add a small pinch of salt and pepper so they already taste good before they meet the eggs.

Step 3: Mix the Egg Custard

Crack the eggs into a large mixing bowl. Add the milk or half-and-half, Greek yogurt or sour cream, salt, pepper, garlic powder, onion powder, Italian seasoning, and red pepper flakes if you use them. Whisk until the mixture turns smooth and creamy with no streaks of egg white.

Stir in 1 1/4 cups of the shredded cheese, saving the remaining 1/4 cup for the top. The cheese in the custard helps the quiche hold together and adds flavor in every bite.

Step 4: Assemble the Quiche

Spread the sautéed vegetables evenly in the greased pie dish. Pour the egg and cheese mixture over the vegetables, tilting the dish slightly if needed to distribute everything evenly. Sprinkle the remaining shredded cheese and the Parmesan on top.

If you use tomato, scatter the diced tomato over the top for color. Gently press any larger pieces down so they sit in the custard, not just on the surface.

Step 5: Bake

Place the baking sheet with the pie dish on the middle rack of the oven. Bake 30 to 40 minutes, depending on your oven and the depth of your dish. The quiche should puff slightly, the edges should look golden, and the center should look set with a gentle wobble when you nudge the dish.

If the top browns too quickly, tent it loosely with foil and keep baking until the center sets. Do not overbake, or the eggs can turn rubbery.

Step 6: Rest and Slice

Remove the quiche from the oven and set it on a cooling rack. Let it rest 10 to 15 minutes so the custard finishes setting and the slices hold together. Slice into wedges with a sharp knife and serve warm, or let it cool to room temperature if you prefer.

Variations I've Tried

Mushroom & Swiss
Swap half the vegetables for sliced mushrooms and sauté them until they brown and release their moisture. Use Swiss or Gruyère cheese for a nutty flavor.
Spinach & Feta Mediterranean Style
Use plenty of spinach, add a handful of chopped sun-dried tomatoes, and swap some of the shredded cheese for crumbled feta. Add a pinch of dried oregano and a little extra black pepper.
Southwest Veggie Quiche
Use bell pepper, onion, corn, and black beans. Season with cumin and chili powder and use a blend of cheddar and pepper jack cheese.
Broccoli Cheddar Classic
Load the dish with small broccoli florets and use sharp cheddar as the main cheese. Add a small pinch of nutmeg for a subtle, cozy flavor.
Low Carb High Protein
Add extra egg whites to the mixture and use Greek yogurt and a lighter cheese. Load up on non-starchy vegetables like spinach, broccoli, and zucchini.

How to Serve Crustless Garden Vegetable Quiche Recipe

Serve this crustless garden vegetable quiche recipe warm or at room temperature with a simple green salad and fresh fruit. Add sliced avocado on the side for healthy fats and extra creaminess. Pair it with hot coffee, tea, or a tall glass of orange juice for a brunch feel. You can also pack slices in lunch boxes with carrot sticks and hummus for a balanced meal.

How to store

Fridge: Cool the quiche completely, then cover the dish tightly or transfer slices to an airtight container and refrigerate for up to 4 days.
Freezer (whole or slices): Wrap the cooled quiche or individual slices tightly in plastic wrap, then place in a freezer bag or container and freeze for up to 2 months.
Reheat from fridge: Reheat slices in a 325°F oven or toaster oven for 10 to 15 minutes until warm in the center; you can also microwave in short bursts, but the oven keeps the texture better.
Reheat from freezer: Thaw overnight in the fridge, then warm in a 325°F oven for 15 to 20 minutes until heated through.