Crustless Spinach, Onion and Feta Quiche

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A crustless quiche is a lighter, gluten-free-friendly alternative to traditional quiche. This version combines spinach, sweet sautéed onions, and tangy feta cheese in a fluffy egg custard.

Yield

  • 8 slices
  • Serves 6–8

Preparation Time

  • Prep: 15 minutes
  • Cook: 35–40 minutes
  • Total: 55 minutes

Ingredients

Main Ingredients

  • 8 large eggs
  • 1 cup (240 ml) whole milk
  • ½ cup (120 ml) heavy cream
  • 1 tablespoon olive oil
  • 1 medium yellow onion, thinly sliced
  • 5 oz (140 g) fresh spinach, roughly chopped
  • 5 oz (140 g) feta cheese, crumbled
  • ½ teaspoon salt
  • ½ teaspoon black pepper
  • ¼ teaspoon nutmeg (optional)

For the Baking Dish

  • Butter or cooking spray

Nut Information

Contains Nuts?

No nuts are used in this recipe.

Common Allergens

  • Eggs
  • Milk/Dairy (milk, cream, feta)

Nut-Free Notes

  • All ingredients are naturally nut-free.
  • If serving someone with a severe nut allergy, check packaged feta and seasonings for cross-contamination warnings.

Gluten Information

  • Naturally gluten-free since there is no crust.
  • Verify packaged ingredients if preparing for someone with celiac disease.

Equipment Needed

  • 9-inch (23 cm) pie dish or quiche dish
  • Large skillet
  • Mixing bowl
  • Whisk

Instructions

Step 1: Prepare the Oven

  1. Preheat oven to 375°F (190°C).
  2. Grease a 9-inch pie dish with butter or cooking spray.

Step 2: Cook the Vegetables

  1. Heat olive oil in a skillet over medium heat.
  2. Add sliced onions.
  3. Cook for 8–10 minutes until softened and lightly golden.
  4. Add spinach and cook for 2–3 minutes until wilted.
  5. Remove from heat and cool slightly.

Step 3: Make the Egg Mixture

  1. In a large bowl, whisk together:
    • Eggs
    • Milk
    • Heavy cream
    • Salt
    • Pepper
    • Nutmeg (if using)
  2. Whisk until completely smooth.

Step 4: Assemble

  1. Spread the spinach-onion mixture evenly in the prepared dish.
  2. Sprinkle crumbled feta over the vegetables.
  3. Pour the egg mixture on top.

Step 5: Bake

  1. Place dish in the oven.
  2. Bake for 35–40 minutes.
  3. The center should be set and the top lightly golden.
  4. A knife inserted near the center should come out clean.

Step 6: Rest and Serve

  1. Let quiche rest for 10 minutes before slicing.
  2. Cut into wedges and serve warm or at room temperature.

Nutrition Information (Approximate Per Slice)

Nutrient Amount
Calories 180
Protein 11 g
Carbohydrates 3 g
Fat 14 g
Saturated Fat 6 g
Fiber 1 g
Sodium 330 mg

Values are estimates and may vary by ingredient brand.

Variations

Mediterranean Style

Add:

  • Sun-dried tomatoes
  • Kalamata olives
  • Fresh oregano

Mushroom Version

Add:

  • 1 cup sautéed mushrooms

Herb Version

Add:

  • Fresh dill
  • Chives
  • Parsley

Extra Protein

Add:

  • Cooked turkey bacon
  • Diced ham
  • Grilled chicken

Chef’s Tips

  • Squeeze excess moisture from spinach to prevent a watery quiche.
  • Allow onions to caramelize slightly for deeper flavor.
  • Room-temperature eggs blend more evenly into the custard.
  • Resting after baking improves texture and slicing.

Frequently Asked Questions (Q&A)

Q1: Can I use frozen spinach?

Yes. Thaw completely and squeeze out as much water as possible before using.

Q2: Can I make it ahead?

Yes. Bake up to 2 days in advance and refrigerate.

Q3: Can I freeze it?

Yes. Cool completely, wrap tightly, and freeze for up to 2 months.

Q4: How do I reheat?

Bake at 350°F (175°C) for 10–15 minutes or until warmed through.

Q5: Why is my quiche watery?

Usually due to excess moisture from spinach or underbaking.

Q6: Can I use only milk instead of cream?

Yes. The quiche will be slightly less rich but still delicious.

Q7: What can replace feta?

  • Goat cheese
  • Ricotta
  • Cottage cheese
  • Sharp cheddar

Q8: Is this keto-friendly?

Yes. It is relatively low in carbohydrates and suitable for many low-carb diets.

Q9: What should I serve with it?

  • Green salad
  • Roasted potatoes
  • Fresh fruit
  • Tomato soup

Q10: Can I make it dairy-free?

Yes. Use dairy-free feta alternatives and unsweetened plant milk. The texture may be slightly different.

Storage

  • Refrigerator: 3–4 days in an airtight container.
  • Freezer: Up to 2 months.
  • Reheat before serving for the best flavor and texture.

This Crustless Spinach, Onion and Feta Quiche is ideal for breakfast, brunch, lunch, or a light dinner, offering a savory combination of creamy eggs, tender spinach, sweet onions, and salty feta cheese.

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