Mix flour, sugar, salt in a bowl. Cut in cold butter. Break up butter and slowly add cold water. Divide into two discs, wrap in plastic wrap, and place in fridge for 30 minutes.
Core, peel and chop up apples. Add to medium sauce pan. Stir in sugars, salt nutmeg and cinnamon. Place on medium heat and cook until juices fall to bottom of pan. Add in flour. Continue to cook and stir occasionally for 5-10 minutes, until thickened.
Pour out filling onto cookie sheet to cool while you roll out your pie crust.
Rollout bottom crust, gently press into pie plate, place in fridge.
Roll out top crust
Remove bottom pie crust from fridge, pour filling into the pie plate. Place top crust on top and crimp edges.
Place assembled pie in freezer for 30 minutes while you preheat your oven to 400 degrees with empty cookie sheet inside
Place pie on cookie sheet in oven, cook for 30 minutes. Cover pie with tinfoil, reduce heat to 375 and cook for 15 minutes. Cool & set for 2 hours before serving