In a large bowl, sift together flour, sugar and salt. With a pastry blender or fork, cut in soft butter until mixture resembles coarse crumbs.
Mix together egg and water, then add to flour mixture. Mix until dough is moist enough to form a ball.
Divide dough in half. On a lightly floured surface, roll one half into a 12-inch circle. Press dough into pie plate, and crimp to form a decorative border.
Set aside and make pie filling.
Preheat oven to 350 degrees.
Mix apples, flour, sugar and cinnamon. Stir gently. Pour into unbaked pie shell. Dab with butter and pour milk over filling.
Roll top crust, same as bottom, and lift onto filled pie or decorate with woven lattice top.
Bake 40-45 minutes. Filling for one pie.