Use a pie crust shield to protect the outer crust from burning. If you don't have a pie crust, you can make one yourself by cutting a circle out of aluminum foil that covers the crust and fits the outer edge of the pie dish. If you find that the center crust is browning too fast, create a loose-fitting "tent" out of aluminum foil and place it over the entire pie. This way the filling will continue baking and the browning of the crust will be slowed!