In a food processor, combine the flour, salt, sugar, and cinnamon.
Add the butter and pulse until the butter is about pea-sized.
Slowly add the water and pulse until the dough forms.
Wrap the dough in plastic warp and refrigerate for at least one hour.
For the filling:
In a large pot or dutch oven, melt the butter over medium-low heat. Whisk in the flour and cook for 2-3 minutes. Add water, white sugar, brown sugar, nutmeg, and cinnamon. Bring to a boil and cook for 5 minutes, stirring constantly.
Stir in the apples and cook for 5 more minutes.
Take it off the heat and allow it to cool.
To assemble:
Preheat the oven to 425F degrees.
Divide the pie crust dough in half. Roll out half the dough to fit a 9 inch pie dish. Lay and press the pie crust into the dish.
Pour in the cooled filling. Roll out the other half of the dough and decorate the top to your liking. Place over the filling, then flute rim.
In a small bowl, mix together the egg and cream. Brush it over the top of the pie for a shiny finish.
In another small bowl, mix together 2 tablespoons sugar and 2 teaspoons cinnamon. Sprinkle over the top of the pie.
Bake for 15 minutes. Reduce the heat to 350F and cook for another 35-40 minutes.
Notes
If the dough becomes too soft when rolling it, put it back in the fridge for 5-10 minutes.
Recipe by Sprig and Flours at http://www.sprigandflours.com/mcdonalds-like-apple-pie/