Line a large baking sheet with parchment paper making sure it goes up the sides and over the edges in case the pie leaks.
Flour a large work surface and roll one of the halvesout into a 9 x 12-inch rectangle. Fold it in half then in half again and transfer to the baking sheet. Unfold.
Roll the remaining crust out to a 9 x 12-inch rectangle.
Top the bottom piece with the apples leaving a 1-inch border - spread them out evenly.
Fold the remaining crust up in half then half again and top the pie with it - unfold.
Fold the edges of the bottom crust over the top and press together.
Go around the border with a fork pressing the crust together again. Refrigerate 20 minutes.
Meanwhile preheat the oven to 400 degrees F.
Bake the pie 20 - 25 minutes until golden brown around the edges. Cool on the baking sheet.