For crust, combine flour and the 1/2 teaspoon salt. Using a pastry blender, cut in shortening till the mixture resembles small peas.
Add milk and water, a tablespoon at a time, until all is moistened. Divide dough in half. Form dough into two balls. On a lightly floured surface, roll each ball of dough into a 12-inch circle. Line a 9-inch pie plate with half of the pastry.
In a mixing bowl, combine the sugar, cornstarch, cinnamon, 1/4 teaspoon salt, and the nutmeg. Add apples and toss gently to coat.
Transfer apple mixture to crust-lined pie plate and dot with butter. Trim pastry to edge of pie plate. Cut slits in remaining pastry. Place on filling and seal. Crimp edge as you like. Cover edge of pie with foil.
Bake in a 375 degree oven for 25 minutes. Remove foil. Bake for 30 to 35 minutes more or until filling is bubbly in center. Makes 8 servings.