Onion and Ricotta Cheese Tart

Ingredients

• • 5 cups (1.25 litres) pickling onions (about 3 bags of 284 g)
  • 1/2 lb (225 g) puff pastry, thawed
  • 3 tablespoons (45 ml) olive oil
  • 1 tablespoon (15 ml) butter
  • 1 tablespoon (15 ml) honey
  • 2 tablespoons (30 ml) balsamic vinegar
  • 1 container 300 g ricotta cheese
  • 1 egg
  • 1/3 cup (75 ml) chopped fresh chives
  • 1 teaspoon (5 ml) dried thyme
  • Salt and pepper