SWEET ONION & GRUYERE TARTS

5 from 1 vote

These tarts are so simple to make and can be served for a lovely starter or as a light lunch or dinner served with some dressed salad greens.

Prep Time10

Cook Time35

Total Time44

Course: Lunch

Servings:

Calories: 578kcal

Author: Lovoni

1 Tbsp olive oil
1 Tbsp butter
2 medium-large brown onions, thinly sliced
1/2 tsp sea salt
1 tsp cracked pepper, plus extra for sprinkling
2 Tbsp apple cider vinegar
1 Granny Smith apple, peeled and grated
A little all-purpose flour, for dusting
1 sheet store-bought pastry, thawed according to package instructions about 8 1/2 oz
1 egg yolk, lightly beaten
1 cup grated gruyere cheese
honey, for drizzling optional

Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper.
Heat the oil with the butter in a large frying pan over medium heat. Add the onion, salt and pepper. Cook, stirring occasionally, for 10 to 15 minutes until the onion is softened and browned.
Add the vinegar and apple. Cook, stirring until well combined; set aside, allowing to cool.
Dust a little flour on the counter and roll the pastry into a 12-inch (30cm) square. Cut the pastry into 4 equal pieces. Place each piece on the baking sheet.
Prick the pastry all over with a fork. Brush the edges of each pastry with egg. Spread with the onion mixture on the pastry leaving a 1/2-inch (1.25cm) border around the edges. Sprinkle with gruyere.
Cut diagonal slits in the corner of each pastry so the pastry can easily fold up onto the onion and cheese mixture a little. Fold up the pastry, covering a little of the onion and cheese. Brush the pastry with egg. Sprinkle with a little sea salt and cracked pepper – this is optional but adds a nice texture. Bake for 25 minutes or until the pastry is puffed and golden. Serve warm drizzled with honey. Makes 4.