Preheat oven to 400 F
Mix dry ingredients in a bowl, cut in shortening and butter, add in liquid ingredients (dough would be a little wet to the touch, it's okay)
Divide into two portions and roll flat one (between two floured parchment papers), place on greased pie plate (9 inch)
Spread filling and roll the other dough (also between two floured parchment paper) and cover filling
Seal edges, and cut some holes as vent
Brush pie with 'egg wash'
Bake for 30 minutes, covering edges with aluminum foil, turn down heat to 350 F and bake for another 20 minutes, cool on rack