There’s something incredibly satisfying about a quiche that emerges from the oven golden, puffed, and fragrant. But let’s be honest—making pastry can be a weekend project we don’t always have time for. That’s where this crustless zucchini tomato quiche comes in.
It delivers all the creamy, savory comfort of a traditional quiche with a fraction of the effort and carbs. As someone who has prepped countless hotel pans of quiche for brunch service, I can tell you this version is a weeknight and meal-prep hero. It’s packed with summer’s best vegetables, bound in a rich, cheesy custard, and bakes into a dish that’s elegant enough for guests and simple enough for a Tuesday morning.
Let’s make a quiche that’s all about the good stuff inside.
This recipe is designed for real life—busy mornings, lazy weekends, and the need for something reliably delicious. Here’s what makes it a keeper:
- No Pastry Stress: Skip rolling, chilling, and blind-baking. A well-greased pie dish is all you need for a perfect, fuss-free crust.
- Meal Prep Champion: Cook once, eat all week. It reheats beautifully and tastes fantastic warm, cold, or at room temperature.
- Sneak in Veggies: This is a delicious, painless way to add more vegetables to your day. The zucchini becomes tender and mild, while the tomatoes add juicy bursts of flavor.
- Incredibly Customizable: The base recipe is a canvas. Swap the cheeses, add different herbs, or throw in some cooked bacon or spinach.
- Diet-Friendly by Design: It’s naturally gluten-free (with GF flour) and low in carbs, fitting seamlessly into various eating plans without tasting like a “diet” food.
- Texture Perfection: By taking the time to properly drain the zucchini, you ensure a firm, sliceable quiche, not a watery mess.
Ingredients You’ll Need
- Let’s gather our ingredients. This recipe works because of a balance of moisture-rich vegetables, a stable custard, and savory depth from cheese. Quality matters most with a few key players.
- Zucchini: One medium zucchini, grated, is the star. Its mild flavor and texture are perfect here. The single most important step is salting and squeezing it to remove excess water.
- Tomatoes: I prefer cherry or grape tomatoes halved. They hold their shape better and are less watery than large tomato slices.
- Eggs & Dairy: Six large eggs and one cup of whole milk or half-and-half create the custard. Half-and-half yields a slightly richer result. For the cheese, I love a combination of sharp cheddar for punch and Gruyère for nuttiness, with Parmesan for salty depth.
- Aromatics: A humble onion and garlic build a foundational savory flavor that makes this quiche taste complex.
- The Stabilizer: Two tablespoons of all-purpose flour (or a 1:1 gluten-free blend) is my professional secret. It absorbs any residual vegetable moisture and helps the custard set firmly without a crust.
Trust me, taking five extra minutes to properly prep the zucchini makes all the difference between a great quiche and a soggy one. Now, let’s get cooking.
Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.
Kitchen Equipment Needed
You don’t need any specialty gear for this recipe. A 9-inch pie dish or a deep quiche pan is essential—a cake pan can work in a pinch. A box grater makes quick work of the zucchini, though a food processor with a grating disc is even faster.
You’ll also need a colander for draining, a large mixing bowl, a whisk, a skillet for sautéing, and the usual measuring tools. That’s it!
How to Make Crustless Zucchini Tomato Quiche Recipe
Step 1: Prep the Zucchini and Pan
Preheat your oven to 375°F (190°C). Grease your pie dish generously—this is your only defense against sticking. Grate the zucchini, toss it with salt in a colander, and let it sit.
This step draws out the water through osmosis. Believe me, I’ve skipped this before in a rush and ended up with a quiche soup. Ten minutes now saves texture later.
Step 2: Sauté the Aromatics
While the zucchini drains, heat olive oil in your skillet and cook the diced onion until soft and sweet, about 5 minutes. Add the garlic right at the end for just a minute; burnt garlic is bitter. Tip from me: let this mixture cool for a few minutes in your mixing bowl before adding the eggs to prevent them from accidentally starting to cook.
Step 3: Squeeze and Combine
Now, take handfuls of that salted zucchini and squeeze them over the sink with all your might. You’ll be shocked at the amount of liquid released. This is the magic.
Add the dry zucchini to the bowl with the onions. Then, stir in the halved tomatoes, eggs, milk, most of the cheese (save some for the top!), Parmesan, flour, and seasonings.
Step 4: Bake to Golden Perfection
Pour the filling into your waiting dish and sprinkle the reserved cheese on top. The cheese will form a delicious, golden crust. Bake on the center rack for 40-50 minutes.
You’re looking for a set center (a slight jiggle is fine) and a beautifully browned top. Ovens vary, so start checking at 40 minutes.
Step 5: Rest, Slice, and Serve
Here’s the hardest part: let it rest. Take the quiche out and let it cool in the pan for at least 15 minutes. This allows the proteins in the eggs to fully set, so you get clean slices instead of a scramble.
Garnish with fresh basil or chives for a pop of color and freshness, then slice and enjoy.
A few insights from the kitchen can elevate your results from good to exceptional.
- The Squeeze Test: After salting, your zucchini should feel significantly less wet and more compact. If you can squeeze out a tablespoon or more of water from a handful, you’re on the right track.
- Cheese Selection: For the best melt and flavor, grate your own cheese from a block. Pre-shredded cheese contains anti-caking agents that can make the texture slightly grainy and inhibit smooth melting.
- Doneness Cue: The quiche is done when an instant-read thermometer inserted into the center reads 160°F. Visually, the edges will be puffed and golden, and the center should not look liquidy when you gently jiggle the pan.
- Avoid Overmixing: Whisk the eggs just until the yolks and whites are combined before adding other ingredients. Over-beating incorporates too much air, which can lead to uneven rising and a less creamy texture.
- Room Temperature Ingredients: For the most even cooking and smooth custard, try to use eggs and milk that aren’t stone-cold from the fridge. Taking them out 20 minutes before you start helps.
Recipe Variations
- This recipe is wonderfully adaptable. Here are some tested variations to make it your own.
- Mediterranean Twist: Add 1/4 cup chopped sun-dried tomatoes (oil-packed, drained) and 1/2 cup crumbled feta cheese in place of the cheddar. Stir in a teaspoon of dried oregano.
- Protein Powerhouse: Fold in 1/2 cup of diced cooked ham, crumbled cooked sausage, or chopped cooked bacon with the vegetables. Reduce the salt slightly if your meat is already salty.
- Green Goddess: Swap half the zucchini for a 10-ounce package of thawed and thoroughly squeezed frozen chopped spinach. Add a handful of fresh dill along with the basil.
- Southwestern Style: Use pepper jack cheese. Add a diced jalapeño (seeds removed for less heat) to the onion sauté and a pinch of cumin.
- Dairy-Free Version: Use unsweetened, unflavored almond or oat milk and a dairy-free cheese shred that melts well. Nutritional yeast (2 tbsp) can add a cheesy flavor in place of Parmesan.
- Crust Option: If you miss the crust, simply press 1 1/2 cups of seasoned breadcrumbs or crushed crackers mixed with 4 tbsp melted butter into the greased pie dish before adding the filling.
What to Serve With This Recipe
This quiche is a versatile centerpiece. For a light lunch or dinner, pair it with a simple arugula salad dressed with lemon juice, olive oil, salt, and pepper—the peppery greens cut through the richness perfectly. For a heartier brunch spread, add roasted potatoes or hash browns and a platter of fresh fruit.
It’s ideal for showers, holiday mornings, or a make-ahead breakfast during a busy week. Beverage-wise, a crisp Prosecco or mimosa complements brunch, while iced tea or coffee works for any time of day.
Storage & Make-Ahead Instructions
- Storage: Once cooled completely, cover the quiche tightly with plastic wrap or transfer slices to an airtight container. It will keep in the refrigerator for 3-4 days.
- Freezing: This quiche freezes remarkably well. Cool completely, wrap the whole quiche or individual slices tightly in plastic wrap and then aluminum foil. Freeze for up to 2 months. Thaw overnight in the refrigerator.
- Reheating: To reheat a whole quiche, cover it with foil and warm in a 325°F oven for 15-20 minutes. For slices, a quick 60-90 seconds in the microwave works, though the oven will preserve the texture better. Avoid reheating from frozen in the microwave, as it can make the eggs rubbery.
- Make-Ahead: You can sauté the onions, garlic, and prep the squeezed zucchini a day ahead. Store them separately in the fridge. Simply whisk everything together and bake the next morning for a fresh, hot quiche with minimal morning effort.
Frequently Asked Questions
Q: Can I use a different vegetable instead of zucchini?
Absolutely. The key is managing moisture. Grated, salted, and squeezed summer squash, yellow squash, or even peeled, grated eggplant would work following the same method.
For broccoli or asparagus, blanch and chop finely.
Q: My quiche is still watery after baking. What happened?
This almost always traces back to insufficiently draining the zucchini. Next time, salt it generously, let it drain longer (up to 30 minutes), and be ruthless when squeezing. Also, ensure you’re using the flour as directed—it’s there as a safety net.
Q: Can I make this recipe dairy-free?
Yes. Use a plain, unsweetened non-dairy milk like almond or oat. For the cheese, look for a shred-style vegan cheese that melts well.
Adding a tablespoon of nutritional yeast can boost the savory, cheesy flavor.
Q: How do I know when the quiche is done without overcooking it?
The visual and tactile cues are your best friends. The edges should be set and pulling slightly away from the pan, the top golden brown. The center should have only the slightest jiggle—like set Jell-O—not a liquid wave.
An instant-read thermometer reading of 160°F in the center is foolproof.
Q: Why did my quiche puff up like a soufflé and then deflate?
This is usually caused by over-whisking the egg mixture, which incorporates too much air. It’s harmless and still tastes great! To avoid it, mix just until combined.
A slight deflation as it cools is normal.
Q: Can I double this recipe?
You can, but bake it in a 9×13 inch baking dish. The baking time will increase, likely to 50-60 minutes. Use the same visual and temperature doneness tests.
Q: Is it okay to use egg substitutes?
I have not tested this recipe with liquid egg substitutes. They can work but often result in a less firm, more rubbery texture. If you try it, know that the results may differ.
Final Thoughts
This crustless zucchini tomato quiche is more than just a recipe; it’s a reliable template for a nutritious, satisfying meal that respects your time. It proves that eating well doesn’t require complicated techniques or obscure ingredients—just a little know-how with everyday vegetables. The process of salting and squeezing the zucchini is a small act of kitchen alchemy that guarantees a perfect result every time.
I hope this becomes a staple in your rotation, a dish you feel confident serving to friends or savoring on a quiet morning. Give it a try, play with the variations, and make it your own. I’d love to hear how it turns out for you—share your creations and any clever twists you invent.
Happy cooking
Crustless Zucchini Tomato Quiche
Equipment
- 9-inch pie dish or deep quiche pan
- Box grater or food processor with grating disc
- Colander
- Large mixing bowl
- Whisk
- Skillet
- Measuring cups and spoons
Ingredients
- 1 medium zucchini about 8 ounces, grated
- 1 tsp kosher salt divided
- 1 tbsp olive oil
- 1/2 medium yellow onion finely diced
- 2 cloves garlic minced
- 1 cup cherry or grape tomatoes halved
- 6 large eggs
- 1 cup whole milk or half-and-half
- 1 cup shredded cheese such as sharp cheddar, Gruyère, or a blend, divided
- 1/4 cup grated Parmesan cheese
- 2 tbsp all-purpose flour or gluten-free flour blend
- 1/4 tsp black pepper freshly ground
- 1 tbsp fresh basil or chives chopped, for garnish
Instructions
- Preheat your oven to 375°F (190°C). Grease a 9-inch pie dish or deep quiche pan very well with butter or non-stick spray. Place the grated zucchini in a colander set over a bowl or in the sink. Sprinkle with 1/2 teaspoon of the kosher salt, toss, and let it drain for at least 10 minutes. This crucial step removes excess water to prevent a soggy quiche.
- While the zucchini drains, heat the olive oil in a skillet over medium heat. Add the diced onion and cook, stirring occasionally, until softened and translucent, about 5 minutes. Add the minced garlic and cook for another minute until fragrant. Transfer this mixture to a large mixing bowl to cool slightly.
- Take handfuls of the drained zucchini and squeeze them firmly over the sink to remove as much liquid as possible. You’ll be amazed at how much water comes out—this is the pro secret to a firm, sliceable quiche. Add the squeezed-dry zucchini to the bowl with the onion and garlic.
- To the same bowl, add the halved tomatoes, eggs, milk, 3/4 cup of the shredded cheese, Parmesan, flour, the remaining 1/2 teaspoon of salt, and the pepper. Whisk everything together until the eggs are fully beaten and the mixture is well combined. Pour the filling into your prepared pie dish. Sprinkle the remaining 1/4 cup of shredded cheese evenly over the top.
- Bake the quiche on the center rack for 40-50 minutes. It’s done when the center is just set (a slight jiggle is okay, but it shouldn’t look liquidy) and the top is beautifully golden brown. Let it cool in the pan on a wire rack for at least 15 minutes before slicing. This resting time allows the custard to finish setting. Garnish with fresh basil or chives, slice, and serve.