Soggy pie crust
Preheat a baking stone or sheet pan along with your oven. Put the filled pie pan directly on the preheated stone/pan. That gives the bottom crust a jump-start. Use a pyrex pan because it conducts heat smoothly and well, and because it allows you to see when your bottom crust is brown enough. Bake at 375F. If the edges are brown but the bottom isn't yet done, wrap the edges in foil, shiny side out.