Onion Quiche Crustless
Perfect for brunch or a light dinner, this Crustless Onion Quiche is an irresistible combination of caramelized onions, creamy Gruyère cheese, and a rich custard base—without the fuss of a crust. Golden, tender onions are slow-cooked to perfection, infusing the dish with a deep, savory sweetness, while fresh thyme and a touch of black pepper add subtle layers of flavor. With just 15 minutes of prep and no need to fuss with dough, this gluten-free quiche is as easy to make as it is delicious. Serve it warm or at room temperature for a comforting, elegant meal that’s sure to impress.
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Ingredients
- 2 tablespoons Unsalted butter
- 3 medium Yellow onions
- 4 large Eggs
- 1 cup Milk
- 0.5 cup Heavy cream
- 1 cup Shredded Gruyère cheese
- 2 tablespoons All-purpose flour
- 1 teaspoon Fresh thyme leaves
- 0.5 teaspoon Salt
- 0.25 teaspoon Black pepper
Directions
Step 1
Preheat your oven to 350°F (175°C). Grease a 9-inch pie dish or quiche pan with cooking spray or a thin layer of butter.
Step 2
Peel and thinly slice the yellow onions into half-moons.
Step 3
In a large skillet over medium heat, melt the butter. Add the sliced onions and cook, stirring frequently, until they are golden and caramelized, about 15-20 minutes. Remove from the heat and set aside to cool slightly.
Step 4
In a large mixing bowl, whisk together the eggs, milk, and heavy cream until smooth.
Step 5
Sprinkle the flour over the egg mixture and whisk until well combined and no lumps remain.
Step 6
Stir in the shredded Gruyère cheese, fresh thyme, salt, and black pepper. Mix well.
Step 7
Add the cooled caramelized onions to the egg mixture and gently fold them in until evenly distributed.
Step 8
Pour the quiche mixture into the prepared pie dish, spreading it out evenly.
Step 9
Bake in the preheated oven for 40-45 minutes, or until the top is golden brown, the edges are set, and the center is just slightly jiggly.
Step 10
Remove the quiche from the oven and let it rest for 10 minutes before slicing and serving. Enjoy warm or at room temperature!
Nutrition Facts
| Serving size | 1053.1 grams (1053.1g) |
|---|
| Amount per serving | % Daily Value* |
|---|---|
| Calories | 1647 |
| Total Fat 124.70g | 160% |
| Saturated Fat 71.40g | 357% |
| Polyunsaturated Fat 0.20g | |
| Cholesterol 1068mg | 356% |
| Sodium 2416mg | 105% |
| Total Carbohydrate 56.30g | 20% |
| Dietary Fiber 6.30g | 23% |
| Total Sugars 26.80g | |
| Protein 70.70g | 141% |
| Vitamin D 295IU | 1477% |
| Calcium 1499mg | 115% |
| Iron 5mg | 30% |
| Potassium 1251mg | 27% |
Source of Calories