Absolutely you can freeze it. Prepare the pie and freeze the entire thing unbaked. Wrap it well and it should be fine in the freezer for at least two months. Alternatively, you could also freeze it baked, but since you would have to warm it in the oven to bring it back to life, why not just bake it fresh from the freezer. Just remember it will take longer to bake from frozen. And if using a glass pie dish, let it sit out while the oven preheats so the glass isn't quite as cold when it hits the hot oven.