Description
A savory, free-form tart with a flaky crust, filled with sweet caramelized onions and earthy sautéed mushrooms, perfect for a cozy meal.
Ingredients
Scale
For the Crust:
- 1 1/4 cups all-purpose flour
- 1/2 teaspoon salt
- 1/2 cup unsalted butter, cold and cubed
- 1/4 cup ice water
- 2 large yellow onions, thinly sliced
- 8 ounces cremini mushrooms, sliced
- 2 tablespoons olive oil
- 1 tablespoon balsamic vinegar
- 1 teaspoon fresh thyme leaves
- 1/2 teaspoon black pepper
- 1/2 cup shredded Gruyère cheese
- 1 egg, beaten (for egg wash)
Instructions
1. Prepare the Crust:
- In a bowl, mix flour and salt. Cut in butter until pea-sized crumbs form. Gradually add ice water until dough comes together. Wrap in plastic and chill for 30 minutes.
- Heat olive oil in a skillet over medium-low. Add onions and cook, stirring occasionally, until caramelized (about 25 minutes). Add mushrooms, balsamic vinegar, thyme, and pepper; sauté until mushrooms are tender (8-10 minutes). Let cool.
- Preheat oven to 400°F (200°C). Roll dough into a 12-inch circle on parchment paper. Spread cheese over center, leaving a 2-inch border. Top with onion-mushroom mixture.
- Fold edges of dough over filling, pleating as needed. Brush crust with egg wash. Bake for 25-30 minutes until golden. Cool slightly before serving.
Notes
You can customize the seasonings to taste.