It's time for you to roll your dough into the pie tin and devise a clever way for it to keep from puffing...
It's time for you to par-bake the shell, mix the filling (and allow it time to macerate), spoon the filling into the par-baked pie shell, bake the shell with the filling for a while, meanwhile, make and grind the streusel, top the par-baked-filled-pie-full-of-filling with mounds of streusel, and bake it until perfectly golden brown.