Combine all ingredients for pastry dough using a fork and your hands. Form into a ball and flatten. Chill for about 45 minutes until firmed up.
MAKE THE APPLE FILLING
Thinly slice apples and add to a large mixing bowl. Add cinnamon, nutmeg, lemon juice, maple syrup, citric acid, arrowroot powder, and water. Gently combine together.
ASSEMBLING THE PIE
Preheat oven to 375℉.
Make egg wash by whisking together 1 egg and 2 tsp. milk.
Remove pastry dough and divide into 2 portions. Return half to the fridge while rolling out the first.
Roll half the pastry dough into approximately a 11 inch round. Press onto pie plate. It's easy to press out with your fingers if you need to resize it.
Roll out other half of pastry dough to 11 inch round.
Pour apple filling into the pie base. Cut 1 tablespoon butter into small pieces and place over the top of the filling. Cover with top pastry dough. Seal edges of dough by pinching together top and bottom pastry dough. Either roll edges up and toward the center of the pie or flute edges using fingers.
Cut design in pastry top. I recommend a design similar to my picture because it gives you guides for cutting the pie into 8 pieces. Baste pie with egg wash.
Bake for 50 minutes, uncovered.
Keyword apple pie, apple pie without sugar, homemade pastry