Caramelized Onion Quiche is a savory, indulgent dish that combines the rich, sweet flavor of caramelized onions with a creamy egg custard and flaky, buttery crust. The slow-cooked onions provide a deep, sweet depth of flavor that complements the smooth, custardy filling. This quiche is perfect for brunch, lunch, or a light dinner and can be enjoyed warm or at room temperature. Whether served alongside a fresh salad or as a stand-alone dish, the combination of onions, cheese, and eggs in this quiche is sure to please everyone at the table.
Ingredients:
For the crust:
- 1 1/4 cups all-purpose flour
- 1/4 teaspoon salt
- 1/2 cup unsalted butter, cold and cubed
- 4-5 tablespoons ice water
For the filling:
- 2 tablespoons olive oil
- 2 large onions, thinly sliced
- Salt and pepper, to taste
- 1 teaspoon fresh thyme leaves (optional)
- 1/2 cup grated cheese (Gruyère, cheddar, or Swiss)
- 1 cup heavy cream
- 3 large eggs
- 1/2 teaspoon Dijon mustard (optional)
Instructions:
- Prepare the Crust: In a food processor, combine the flour and salt. Add the cold cubed butter and pulse until the mixture resembles coarse crumbs. Gradually add ice water, one tablespoon at a time, until the dough starts to come together. Turn the dough out onto a floured surface, shape it into a disk, wrap it in plastic wrap, and refrigerate for at least 30 minutes.
- Caramelize the Onions: While the dough chills, heat olive oil in a large skillet over medium-low heat. Add the thinly sliced onions, season with salt and pepper, and cook slowly, stirring occasionally, for about 30-40 minutes, until the onions are golden brown and caramelized. Stir in thyme, if using, and remove from heat. Let the onions cool slightly.
- Preheat the Oven: Preheat your oven to 375°F (190°C). If using a pie dish, lightly grease it or line with parchment paper.
- Roll out the Dough: On a floured surface, roll out the chilled dough into a circle to fit your pie dish or tart pan. Press the dough into the pan, trimming any excess dough around the edges. Use a fork to prick the base of the crust a few times to prevent puffing during baking. Bake the crust for 10-12 minutes, or until lightly golden. Remove from the oven and set aside to cool.
- Prepare the Quiche Filling: In a medium bowl, whisk together the eggs, heavy cream, Dijon mustard (if using), salt, and pepper. Stir in the caramelized onions and grated cheese until well combined.
- Assemble the Quiche: Pour the egg and onion mixture into the partially baked crust. Use a spatula to spread the onions evenly throughout the quiche.
- Bake: Bake the quiche for 30-35 minutes, or until the filling is set and lightly browned on top. You can check for doneness by inserting a knife into the center – it should come out clean.
- Cool and Serve: Allow the quiche to cool for a few minutes before slicing. Serve warm or at room temperature.
This Caramelized Onion Quiche offers a savory, comforting meal that’s perfect for any occasion. With its sweet onions, creamy filling, and flaky crust, it’s sure to be a crowd-pleaser at brunch or dinner.
