Puffy Apple Tart

1. Preheat oven to 400F.
2. Spray a sheet pan with cooking spray.
3. Peel, core and thinly slice the apples.
4. Lay a sheet of puff pastry on the sprayed cooking sheet.
5. Mix egg and water together and brush the top of the puff pasty sheet all over.
6. Cut two 1-inch strips lengthwise off of the remaining pastry sheet. Cut two 1-inch strips off the now short side of the remaining pastry sheet.
7. Lay the strips along the edges of the egg-brushed sheet to create a border.
8. Layer the apple slices along the middle of the pastry. I like to do mine in two lines, but whatever you want is fine.
9. Mix together the next 4 ingredients and 1/4 cup butter (4 tablespoons) to create a streusel topping. Sprinkle over the apple slices.
10. Dot with remaining 6 tablespoons butter.
11. Sprinkle the edges of the pastry with sugar.
12. Bake for about 30 minutes, or until puffed and golden. Let cool slightly before cutting and serving.
13. Top with whipped cream and caramel sauce.