apple mosaic tart with salted caramel

INGREDIENTS

• 14-ounce package puff pastry, defrosted in fridge overnight
• 3 large or 4 medium apples (about 1 1/4 pounds)
• 2 tablespoons granulated sugar
• 2 tablespoons unsalted butter, cold, cut into small bits
• 1/4 cup granulated sugar
• 2 tablespoons unsalted butter (or salted, but then ease up on the sea salt)
• 1/4 teaspoon flaky sea salt (or half as much table salt)
• 2 tablespoons heavy cream