Roll the pastry out to a circle roughly 11- to 12-inches in diameter and drape it over the apples, tucking the edges into the sides of the pan with a wooden spoon as though tucking the apples into bed. Make a small hole in the center of the pastry to vent the pie. Transfer the pan to the oven. (Put a sheet pan on the rack underneath the Tarte Tatin to save your oven from any over spills.)