A caramelized onion upside-down tart with golden puff pastry, elegantly plated on a white dish.

Caramelized onion tart

Name: Caramelized onion tart
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Ingredients: 250 g Puff pastry; 3 pcs Red onion; 2 tbsp Olive oil; 1 tbsp Brown sugar; 30 g Parmesan; 1 tsp. Herbes de Provence; to taste Salt

This tender and delicious onion tart, featuring flaky puff pastry and sweet caramelized onions, is an ideal choice for an appetizer or side dish!

Super easy

45 Mins

Ingredients

Puff pastry
250 g
Red onion
3 pcs
Olive oil
2 tbsp
Brown sugar
1 tbsp
Parmesan
30 g
Herbes de Provence
1 tsp.
Salt
to taste

Cooking instructions

1.
This recipe is for a 26 cm baking dish.
If using frozen puff pastry, refer to the packaging for proper thawing instructions.
Preheat your oven to 180°C.
2.
Peel the onions and cut them lengthwise, from root to tip, into slices approximately half a centimeter thick
3.
Line the baking dish with parchment paper, lightly grease it with oil, and sprinkle sugar evenly across the surface.
4.
Arrange the onion evenly in a single layer.
5.
Season the onion with salt and sprinkle it with herbs. Fresh thyme and rosemary or a Herbes de Provence mix work well.
6.
Lightly sprinkle the onion with grated Parmesan or mozzarella for added flavor.
7.
Cover the filling with puff pastry and pierce it with a fork in several places. I use a 500-gram pack of pastry, dividing it in half and gently stretching it by hand to match the size of the baking dish.
8.
For a beautifully golden crust, brush the pastry with a beaten egg before baking it in a preheated oven at 180°C for 30-35 minutes.
9.
Take the form out of the oven and let it cool for 20 minutes. Afterward, place a plate over it and gently flip it, so the pastry ends up on the bottom and the filling on top.