Crustless Onion Quiche
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Crustless Onion Quiche

This tasty, flavorful crustless onion quiche is keto, low carb and gluten free. It's an easy recipe that yields impressive results.
Course Side Dish
Cuisine French
Keyword gluten free, onion, quiche
Prep Time 10 minutes
Cook Time 45 minutes
Rest time 20 minutes
Total Time 1 hour 15 minutes
Servings 6 slices
Calories 186kcal
Author Vered DeLeeuw


  • Olive oil cooking spray
  • 1 tablespoon olive oil
  • 2 medium onions, thinly sliced (12oz)
  • 1 teaspoon Diamond Crystal kosher salt divided
  • 6 large eggs, lightly beaten
  • 1/2 cup plain Greek yogurt
  • 1/4 teaspoon ground pepper
  • 1/8 teaspoon ground nutmeg
  • 1/4 cup coconut flour (1 oz)
  • 1/2 cup shredded sharp cheddar


  • Preheat oven to 350 degrees F. Spray a 9-inch pie plate with nonstick cooking spray.
  • Heat the olive oil in a large, deep skillet over medium-high heat, about 2 minutes. Add the onions and 1/2 teaspoon kosher salt and cook, stirring often, 8 minutes, until lightly browned. Remove from heat and allow to slightly cool.
  • Meanwhile, in a large bowl, whisk together the eggs, yogurt, 1/2 more teaspoon kosher salt, black pepper, nutmeg and coconut flour. Using a spatula, mix in the cheese and the caramelized onions.
  • Transfer the mixture to the prepared pie plate. Bake 40-45 minutes, until puffed and set and a toothpick inserted in the center of the quiche comes out clean.
  • Remove from oven. Cool 10 minutes in the baking dish on a cooling rack, then carefully run a knife around the edges to loosen. Invert onto a cutting board, then back to the cooling rack to finish cooling, about 10 more minutes.
  • Carefully transfer the quiche back to the cutting board. Use a sharp knife to cut into 6 slices, and serve.


Serving: 1slice | Calories: 186kcal | Carbohydrates: 9g | Protein: 11g | Fat: 11g | Saturated Fat: 6g | Sodium: 524mg | Fiber: 3g