Preheat the oven with the fan-forced mode at 250 degrees.
Get the dough from the fridge, dust the surface with extra flour and roll the dough until it fits the pie pan. Try not to roll too thin and too thick. Then cut out a rough circle slightly bigger than the pan.
Brush the pan with butter. Line the pan with the pastry, lightly pressing down to remove any air pockets, then trim off the excess pastry. Roll out the remaining pastry into another circle, again slightly larger than the pan, for the top crust.
With the top crust, cut into 2 cm pcs each to create a latticework.
Add the apple pie filling evenly into the pan shell, slowly add the lattice pieces on top.
Press down lightly to seal and trim off the excess pastry.
Crimp the edges and brush the top with the egg wash to glaze.
Sprinkle the top pastry with some sugar.
Bake until the crust is golden brown and crisp. (30-40 minutes)
Let it rest for at least 2 hours before serving.