How can I stop my pie from burning?
What you need is to deflect the heat from the top of your pie. If you have two racks in your oven, and can position them so that the pie is in the middle with a rack above it, place a piece of aluminum foil directly above the pie. Another option would be to set a piece of foil on top of the pie after it has partially baked. Either way will protect the top from direct heat, allowing the ambient heat to penetrate and bake the whole pie.