Spinach Tomato and Feta Crustless Quiche Recipe

If you love the vibrant, sunny flavors of the Mediterranean, this Spinach, Tomato and Feta Crustless Quiche is set to become your ultimate breakfast, brunch, or meal-prep staple. Imagine slicing into a light, airy egg custard folded with earthy baby spinach, sweet burst cherry tomatoes, and sharp, tangy sheep’s milk feta cheese. Every bite delivers a harmonious balance of salty, savory, and sweet notes that effortlessly transport your tastebuds straight to the Greek islands.

Visually stunning and restaurant-worthy, this egg bake features beautifully browned golden edges, a vibrant green and red center, and a sleek garnish of blistered whole cherry tomatoes drizzled with aged balsamic glaze. Beyond its gorgeous presentation, this dish is a tactical nutritional win: naturally low-carb, keto-friendly, gluten-free, high in protein, and requiring under 15 minutes of hands-on preparation. Whether you are hosting a weekend brunch or gearing up for a busy workweek, this effortless Mediterranean bake proves you don’t need a heavy pastry crust to enjoy a luxurious, fluffy quiche.

Why You’ll Love This Mediterranean Crustless Quiche

• Naturally Gluten-Free & Low Carb: By skipping the traditional flour pastry crust, you drastically eliminate refined carbohydrates and heavy gluten without sacrificing structural integrity or rich flavor.
• Heart-Healthy Mediterranean Swaps: Instead of heavy whipping cream, this recipe whisks full-fat Greek yogurt and whole milk directly into the eggs. This secret swap creates a velvety, high-rise custard packed with natural protein, calcium, and gut-healthy probiotics.
• Spanakopita-Inspired Flavors: It captures the soul-warming profile of classic Greek spanakopita by pairing tender spinach, briny feta cheese, aromatic garlic, extra virgin olive oil, and a subtle warm touch of nutmeg. (If you love these classic Greek flavor profiles, be sure to check out our traditional Greek spinach and feta frittata).
• Perfect for Meal Prep: Unlike crust-bound quiches that absorb moisture and become soggy over time, this crustless version retains its firm yet tender texture in the refrigerator for up to 4 days.

Ingredients You’ll Need for a Fluffy Mediterranean Quiche

• Large Eggs (8 count): The fundamental structural core of our quiche. Using fresh, room-temperature eggs allows them to whip more easily, trapping air bubbles that produce a noticeably higher rise and softer crumb.
• Greek Yogurt & Whole Milk Mix (1 cup total): The ultimate Mediterranean technique for a lighter, custard-like texture without heavy cream. Plain Greek yogurt adds a subtle, refreshing tang while maintaining structural density.
• Fresh Baby Spinach (5 oz / ~4–5 cups packed): Fresh baby spinach sautéed in extra virgin olive oil yields superior texture and a clean, sweet flavor compared to frozen varieties.
• Crumbled Feta Cheese (1 cup): Seek out authentic Greek sheep’s milk or goat’s milk feta packed in brine. Crumbing it fresh from the block yields unmatched creaminess and an authentic salty tang that pre-crumbled, dry feta simply cannot match.
• Cherry Tomatoes (2 cups total): Divided intentionally into two culinary uses—halved cherry tomatoes mixed directly into the batter form juicy, sweet pockets inside the bake, while whole cherry tomatoes are blistered separately for an elevated plate presentation. (For another spin on this classic ingredient combo, try our popular Crustless Spinach, Sun-Dried Tomato and Feta Quiche).
• Extra Virgin Olive Oil & Aromatics: Cold-pressed EVOO, 1 small chopped yellow onion, 2 minced garlic cloves, sea salt, freshly cracked black pepper, and a tiny pinch of ground nutmeg to lift the deep savory notes of the eggs.

How to Make Crustless Spinach, Tomato, and Feta Quiche

Step 1 – Sauté & De-Moisturize the Greens

Preheat your oven to 375°F (190°C) and generously grease a deep 9-inch pie dish or springform pan with olive oil or butter. Heat 1 tablespoon of extra virgin olive oil in a skillet over medium heat. Sauté the chopped onions for 3 to 4 minutes until soft and translucent, then stir in the minced garlic for 60 seconds until fragrant. Fold in the fresh baby spinach, tossing continuously until fully wilted (about 2 minutes).

Mandatory Pro-Tip for Success: Transfer the warm spinach mixture to a fine-mesh strainer or press it between clean paper towels to squeeze out all trapped moisture. Removing this excess liquid is the single most critical step to avoiding a soggy, watery bottom.

Step 2 – Whisk the High-Rise Egg Custard

In a large mixing bowl, crack the 8 room-temperature eggs. Add the Greek yogurt, whole milk, sea salt, black pepper, and nutmeg. Vigorously whisk the custard for a full 60 to 90 seconds until the mixture is completely homogeneous, smooth, light, and visibly aerated with tiny surface bubbles. Aerating the eggs thoroughly gives your Spinach, Tomato and Feta Crustless Quiche its signature cloud-like rise.

Step 3 – Layering for Perfect Distribution

Spread the squeezed, sautéed spinach mixture across the bottom of your greased baking dish. Scatter half of the crumbled feta cheese and half of the halved cherry tomatoes evenly over the greens. Slowly pour the whipped egg custard over the base. Finish by gently scattering the remaining halved tomatoes on top so they float gracefully near the surface, guaranteeing a gorgeous slice every time.

Step 4 – Baking & The Blistered Tomato Garnish

Place the quiche on the middle rack of your oven and bake for 40 to 45 minutes. The quiche is done when the outer edges are deeply golden brown, slightly puffed, and the center is set (a slight jiggle is fine, but it should not be wet). While the quiche bakes, toss 1 cup of whole cherry tomatoes with 1 teaspoon of olive oil, salt, and pepper on a small tray. Bake them alongside the quiche for the final 10 minutes until their skins blister and burst.

Step 5 – Plating Like a Pro

Remove the baked quiche from the oven. Immediately sprinkle the reserved feta cheese and freshly chopped flat-leaf parsley across the hot surface so the cheese gently softens from the residual heat. Allow the quiche to rest for 10 minutes to set the internal custard. Slice into 6 neat wedges and serve each piece with a side of blistered cherry tomatoes and a sleek, elegant drizzle of aged balsamic glaze across the plate.

Secrets to Preventing a Watery Crustless Quiche

Watery or “weeping” quiche happens when excess vegetable liquid is trapped inside the baking dish or when overcooked egg proteins tighten up and push out water. You can guarantee a dense, silky slice every single time by following these 3 strict rules:

1. Wring Out Your Greens: Never skip squeezing cooked spinach in paper towels or cheesecloth. Spinach contains up to 90% water weight that releases under oven heat.
2. Choose Cherry Tomatoes Over Large Tomatoes: Whole sliced tomatoes contain watery seed cavities that release liquid while baking. Cherry tomatoes have a firmer skin-to-seed ratio and hold their juice intact.
3. Respect the 10-Minute Rest Window: Slicing directly out of the oven causes hot steam to escape rapidly, causing the egg matrix to collapse and weep liquid onto your plate. Rested custard holds its shape cleanly.

Spinach, Tomato and Feta Crustless Quiche

A light, fluffy Mediterranean egg bake packed with fresh spinach, juicy cherry tomatoes, and tangy sheep's milk feta. Naturally gluten-free, low-carb, and perfect for breakfast or meal prep!

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Prep Time 15 minutes mins

Cook Time 45 minutes mins

Servings: 4

Calories: 210

Ingredients Method Notes

Ingredients

  

Quiche Base & Filling:

• – 8 large eggs room temperature
• – 1/2 cup plain Greek yogurt full-fat
• – 1/2 cup whole milk
• – 5 oz fresh baby spinach roughly 4-5 packed cups
• – 1 cup cherry tomatoes halved, divided
• – 1 cup Greek feta cheese crumbled, divided
• – 1 small yellow onion finely chopped
• – 2 cloves garlic minced
• – 1 tbsp extra virgin olive oil
• – 1/2 tsp sea salt
• – 1/4 tsp freshly cracked black pepper
• – 1/8 tsp ground nutmeg
• – 2 tbsp fresh flat-leaf parsley finely chopped, for garnish

Blistered Tomato Side & Drizzle:

• – 1 cup whole cherry tomatoes
• – 1 tsp extra virgin olive oil
• – 1 tsp high-quality balsamic glaze

Method

 

1. Preheat oven to 375°F (190°C). Generously grease a deep 9-inch pie dish or springform pan with olive oil or butter.
2. Heat 1 tbsp olive oil in a skillet over medium heat. Sauté chopped onions for 3-4 minutes until translucent. Add minced garlic and cook for 1 minute until fragrant.
3. Add fresh baby spinach to the skillet and toss for 2 minutes until fully wilted.
4. Transfer spinach mixture to a fine-mesh strainer or paper towels and squeeze out all excess liquid thoroughly.
5. In a large bowl, vigorously whisk together eggs, Greek yogurt, whole milk, sea salt, black pepper, and nutmeg until light, bubbly, and aerated (about 60-90 seconds).
6. Spread squeezed spinach, half of the halved cherry tomatoes, and half of the crumbled feta across the bottom of the greased pan.
7. Gently pour the egg custard over the fillings. Top with the remaining halved cherry tomatoes so they float near the surface.
8. Bake for 40 to 45 minutes until the edges are golden brown and the center is set.
9. Toss whole cherry tomatoes in 1 tsp olive oil with a pinch of salt/pepper. Roast on a small tray alongside quiche during the last 10 minutes of baking until blistered.
10. Remove quiche from oven. Top immediately with remaining crumbled feta and fresh parsley.
11. Rest for 10 minutes before slicing into 6 wedges. Serve each slice accompanied by blistered tomatoes and a drizzle of balsamic glaze.

Notes

– Moisture Control: Squeezing the liquid out of the spinach is essential to avoid a watery quiche.
– Reheating: Reheat slices in an air fryer or oven at 350°F for 5-7 minutes for best texture.
– Dairy-Free Swap: Use unsweetened almond milk and plant-based feta alternatives.

Easy Variations & Protein Add-Ins

• Keto & Strictly Low-Carb: Skip the sweet balsamic glaze garnish entirely, or replace it with a quick drizzle of extra virgin olive oil and a squeeze of fresh lemon juice.
• Added Protein Options: Boost the satiety factor by folding in cooked wild-caught salmon flakes, crispy diced turkey bacon, or leftover grilled chicken breast cubes before baking.
• Dairy-Free Adaptation: Replace the whole milk and Greek yogurt mix with unsweetened almond milk or coconut cream, and swap standard feta with your favorite plant-based almond-milk feta crumble.
• Side Pairing Idea: Serve this hearty quiche with a crispy side of Roasted Mediterranean Potatoes with Feta and Tomatoes for a complete weekend brunch feast!

Make-Ahead, Storage & Freezing Tips

• Refrigeration: Allow the baked quiche to cool to room temperature. Transfer slices to an airtight container and store in the refrigerator for up to 4 days.
• Reheating: Reheat individual slices in a preheated oven or air fryer at 350°F (175°C) for 5 to 7 minutes. This restores the crisp, golden outer crust while keeping the interior custard soft. Avoid microwave reheating when possible, as it can make eggs rubbery.
• Freezing: Wrap fully cooled individual slices tightly in plastic wrap, followed by heavy-duty aluminum foil. Freeze for up to 2 months. Thaw overnight in the fridge before reheating in the oven.

Frequently Asked Questions

Can I use frozen spinach instead of fresh?

Yes! Thaw 5 ounces of frozen chopped spinach completely, place it in a clean kitchen towel, and wring out every last drop of water before stirring it into your onion and garlic mixture.

Why did my crustless quiche deflate after baking?

It is completely natural for eggs to puff up high in the oven from trapped air and settle slightly as they cool down. Incorporating full-fat Greek yogurt into the custard helps maintain a stable, dense crumb structure that resists dramatic deflation.

Can I bake this in a pie crust if desired?

Absolutely. If you prefer a traditional pastry shell, blind-bake a 9-inch deep-dish pie crust at 375°F for 10–12 minutes first, then add the filling layers and bake as directed until the egg custard sets.