Things you can do to prevent a soggy bottom. First of all, bake the pie in the bottom third of the oven. Secondly, mix the filling right before adding it to the crust. Thirdly, allow the pie to cool completely before slicing it (I know this is hard!). Fourthly, use cornstarch to thicken the strawberry filling. Lastly, sprinkle custard powder on the bottom of the crust and the topping of the strawberry filling.