In a bowl, combine your flour, salt and half of the shortening and mix well until very fine. Add the remaining shortening and mix until it is in pieces about the size of garden pea. Add a few tablespoons of water and blend until all the dry ingedients are moistened.
Remove dough from bowl and place in a mound on a clean surface. Work the dough just enough to form a ball. Cut the ball in half then wrap each dough with plastic wrap and let it chilli in the fridge for at least 45 minutes to overnight or freezer for 15 minutes.
Preheat your oven to 425 degrees fahreinheit or 220 degrees Celcius.
Peel and slice your apples into bite size. In a bowl, combine your apples, pumpkin spice powder, brown and white sugar. Mix everything until well combined. Set it aside.
Remove one of the dough discs out from the refrigerator. Let it set for few minutes if needed. Lightly sprinkle some flour on the surface and roll it using rolling pin until completely flatten. Sprinkle more flour on the top if needed.
Start at one end, roll dough around rolling pin then unroll over your pie dish to transfer. Use colander to gather excess juice and discard. Toss your apple pie filling into the dish. Add 1 tablespoon of butter to your filling.
Roll your second dough using the exact method from the first one. Brush it with melted butter and sprinkle brown sugar. Design and make sure to cut some slits on the top dough for the heat to escape inside the filling.
Bake it in 425 degrees fahrenheit or 220 degrees celcius for 15 minutes and lower it down to 350 degrees Fahrenheit or 175 degrees Celcius for 35-45 minutes or until the top crust is golden brown. Cool completely before slicing.