Cinnamon Sugar Apple Puff Pastry


*1 sheet puff pastry, thawed
*1/2 cup sugar
*2 teaspoons ground cinnamon
*1/4 teaspoon salt
*1 large egg + 1 teaspoon water
*1 large apple, very thinly sliced
*caramel for serving, optional

This is so quick and easy to make that it only requires simple ingredients. Perfect for those last minute pot lucks! Although the caramel is optional, I highly recommend it!