The rustic caramelized onion tart is a classic French dish that delights with its simplicity and flavor. The sweetness of the caramelized onion contrasts with the crunchiness of the dough, creating an irresistible combination.
Ingredients:

1 ready-made shortcrust pastry
2 large onions, cut into thin slices
4 tablespoons of butter
2 tablespoons of sugar
Salt and black pepper to taste
2 sprigs of fresh thyme
1 beaten egg for brushing
Preparation:

Preheat the oven: To 180°C.
Caramelize the onions: In a saucepan, melt the butter over medium heat. Add the onions and cook over low heat for about 30 minutes, or until soft and caramelized. Season with salt, pepper and thyme.
Assemble the tart: Roll out the shortcrust pastry in a pie pan. Spread the caramelized onions over the dough, spreading them evenly. Fold the edges of the dough inwards.