What Bracha do you make on a Pie?

The Bracha Rishona on Pie is Mezonos, and the Bracha Acharona is Al Hamichya.

As with all cakes, the dough is considered the primary ingredient and only Mezonos is necessary (Mishnah Berurah 212:1), even if there is less dough than pie filling, and even if the cake is eaten mainly because of the pie filling. However, to say an Al Hamichya one must eat a K'zayis of cake within a Kdei achilas Pras (2-9 minutes). Otherwise, one says a Borei Nefashos. On the other hand, if there is merely a thin strip of dough, which is intended just to help you handle all the pie filling, the dough becomes subordinate to the filling and only Haetz need be said.