2 tablespoons olive oil
2 medium onions,
sliced 2 red apples (such as Braeburn or Gala),
cut into small pieces kosher salt and black pepper 2 sheets frozen puff pastry (from a 17.3-ounce package),
thawed ½ cup creme fraiche or sour cream
How to Make It
Step 1
Heat oven to 400º F. Heat the oil in a large skillet over medium heat. Add the onions and cook, stirring occasionally, until soft and golden brown, 12 to 15 minutes. Stir in the apples, ½ teaspoon salt, and ¼ teaspoon pepper and cook until just tender, 2 minutes.
Step 2
Place each sheet of pastry on a parchment-lined baking sheet and prick all over with a fork. Spread with the crème fraîche, leaving a ½-inch border. Top with the onion mixture and bake until the pastry is crisp and browned, 30 to 35 minutes. Cut into pieces before serving.