Caramelized Onion Cheese Tart
A savory caramelized onion cheese tart with a flaky crust, sweet golden onions, and a creamy Gruyere custard filling. Perfect for brunch, light dinners, or elegant gatherings.
Ingredients
Scale
- 1 unbaked 9 inch pie crust
- 3 large yellow onions, thinly sliced, about 4 cups
- 2 tablespoons olive oil
- 1 tablespoon unsalted butter
- 3 large eggs
- 1 cup heavy cream
- 1 1/2 cups shredded Gruyere cheese, about 150 grams
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1 teaspoon fresh thyme, chopped, optional
Instructions
- Preheat oven to 375 degrees Fahrenheit and position rack in the center.
- In a mixing bowl, whisk together eggs, heavy cream, salt, black pepper, and fresh thyme until smooth.
- Heat olive oil and butter in a large skillet over medium low heat. Add sliced onions and cook for 25 to 30 minutes, stirring occasionally, until deeply golden and soft.
- Lightly pre bake the pie crust for 10 minutes. Spread caramelized onions evenly over the crust. Sprinkle shredded Gruyere on top, then pour the egg and cream mixture over everything.
- Bake for 30 to 35 minutes, until the center is set and the top is lightly golden.
- Let the tart cool for at least 10 minutes before slicing and serving.
Notes
- Cook the onions slowly to develop deep sweetness and rich flavor.
- Allow the tart to rest before slicing to ensure clean cuts and a set filling.
- Store leftovers in the refrigerator for up to 3 days and reheat in the oven for best texture.
Find it online: https://tastyze.com/caramelized-onion-cheese-tart/