Description
This savory onion tart recipe combines sweet, caramelized onions with a flaky, buttery crust for a simple dish packed with rich flavor. Elegant enough for entertaining but easy enough for a cozy meal at home, it’s delicious served warm or at room temperature.
Ingredients
Scale
- 1 2/3 cups all-purpose flour
- 1/2 cup (1 stick) cold unsalted butter, cut into cubes
- 1 egg
- A pinch of salt
- 1-2 tbsp cold water
- 3-4 large onions, about 500 g
- 2 tablespoons unsalted butter
- 1/3 cup heavy cream
- 2 eggs
- 1 cup shredded cheese, such as Gruyère, Parmesan, or Cheddar
- Salt and pepper, to taste
- A pinch of nutmeg, optional
Instructions
- In a large bowl, mix the flour, salt, and butter, rubbing the mixture with your fingers until it resembles fine breadcrumbs.
- Add the egg and a bit of cold water, then gently knead until the dough comes together and feels smooth.
- Shape the dough into a ball, wrap it in cling film, and chill it in the refrigerator for 30 minutes.
- Slice the onions into thin half rings.
- In a saucepan or skillet, melt the butter over medium heat. Add the onions and and sauté until soft and caramelized (about 20 minutes). Stir frequently to avoid burning.
- In a separate bowl, whisk the eggs with the cream. Stir in the cheese, salt, pepper, and a pinch of nutmeg.
- Roll out the chilled dough and press it into a 9-inch tart pan, making sure to form the edges. Use a fork to poke holes in the bottom.
- Cover the crust with parchment paper and fill with pie weights or dried beans then pre-bake the crust in a preheated oven at 350°F for 10 minutes.
- Remove the beans/pie weights and parchment paper and spread the caramelized onions into the crust, then pour the egg and cheese mixture over the top.
- Bake at 350°F for another 25-30 minutes, until the filling is golden and set.
- Allow the tart to rest 10 minutes before cutting. It’s delicious warm or chilled.
- Prep Time: 30 minutes
- Cook Time: 50 minutes
- Category: Appetizer, Main Course
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size:
- Calories: 356
- Sugar: 2.8 g
- Sodium: 726.2 mg
- Fat: 23.9 g
- Carbohydrates: 26.1 g
- Fiber: 1.7 g
- Protein: 9.7 g
- Cholesterol: 129.9 mg