Carmel Apple Tartlets

1. Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
2. Unroll the thawed puff pastry sheets. Cut each sheet into 4 squares. Place the squares on the prepared baking sheet.
3. Score a smaller square inside each pastry square, about 1/2 inch from the edge, being careful not to cut all the way through. This will create a border.
4. Peel, core, and thinly slice the apples.
5. In a medium bowl, toss the apple slices with melted butter, brown sugar, cinnamon, and a pinch of salt until well coated.
6. Spoon the apple mixture into the center of each puff pastry square, staying within the scored border.
7. Brush the edges of the puff pastry with the beaten egg wash.
8. Bake for 15-20 minutes, or until the pastry is golden brown and puffed, and the apples are tender.
9. Remove from oven and immediately drizzle with caramel sauce.
10. Let cool slightly on a wire rack before serving.
11. Serve warm, optionally with a scoop of vanilla ice cream or a dollop of whipped cream.