You don't have to pre-bake the bottom pie crust for this pie. There's simply no need to take this extra step because the apple pie bakes for a really long time in the oven. If your pies have soggy crusts, you may not be baking them long enough. See How Do I Know When Apple Pie Is Done above. Additionally, and this is important, I strongly recommend using a glass pie dish. Glass conducts heat slowly and evenly, and you can literally *see* if the bottom crust is done.