In a bowl, combine the first six ingredients; pour into the pastry shell. For topping, combine sugar, flour, cinnamon, and nutmeg in a small bowl; cut in butter until the mixture resembles coarse crumbs. Sprinkle over filling. Bake at 375 degrees for 50-60 minutes or until bubbly and golden brown. Cover edges of crust during the last 20 minutes to prevent overbrowning.