Onion and Gruyère PDO Savory Tart

Here is the recipe for a delicious savory onion and Gruyère PDO tart.

Ingredients

• 1 roll of brisée or ready-to-use puff pastry
• 500 g of white onions
• 1 tablespoon of extra virgin olive oil
• 1 tablespoon of butter
• 200 g of Gruyère PDO, grated
• 3 eggs
• 200 ml of fresh cream
• Salt and black pepper to taste
• Grated nutmeg, to preference
• 1 pinch of sugar (optional)

Preparation

1. Preheat the oven to 180°C.
2. Peel and thinly slice the onions.
3. In a large pan, heat the oil and butter. Add the onions, a pinch of salt, and if desired, a pinch of sugar to promote caramelization.
4. Let the onions wilt over medium-low heat until they are golden and soft, stirring occasionally. This process may take about 20-25 minutes.
5. Meanwhile, lay the brisée pastry in a previously greased tart pan or lined with parchment paper, prick the bottom with a fork, and blind bake (covering it with parchment paper and dried beans or specific pastry weights) for about 10 minutes.
6. In a bowl, beat the eggs with the cream. Add the grated Gruyère, a pinch of salt, black pepper, and nutmeg. Mix well to obtain a homogeneous mixture.
7. When the onions are ready, distribute them evenly over the brisée pastry base.
8. Pour the egg and cream mixture over the onions.
9. Bake the savory tart for about 30-35 minutes or until the surface is golden brown and the filling has set.
10. Remove from the oven and let it cool slightly before serving.

Curiosity

Gruyère is a Swiss cheese with a rich and slightly salty flavor that melts well, giving the savory tart an intense and enveloping taste. Its combination with caramelized onions creates a perfect balance between sweet and savory, making this dish an excellent choice for lunch, a light dinner, or an aperitif.