Savoury Quilt Pie

Ingredients

• • 14 oz (400 g) store-bought puff pastry dough, thawed
  • 2 onions, chopped
  • 1/2 lb (225 g) sliced Black Forest ham, chopped
  • 2 tablespoons (30 ml) olive oil
  • 1/2 cup (125 ml) sour cream
  • 1/4 cup (60 ml) whole-grain mustard
  • 30 green asparagus spears, each 5-inch (12-cm) long
  • 30 white asparagus spears, each 5-inch (12-cm) long
  • 6 eggs
  • Salt and pepper