Crust: Combine flour, sugar, salt, zest, nutmeg & butter in food processor. Blend until mixture resembles coarse meal. Add lemon juice as a stream with motor on & process until moist clumps form. Gather dough into 2 balls, flatten into disks. Wrap each disc in wax paper and refrigerate for at least 30 minute.
Position oven rack in lowest third of oven & preheat to 400°F Roll out 1 disc of dough to 12 inch round and place in 9 in pie dish. Trim to leave 1/2 inch overhang.
Pie Filling: Combine all ingredients (except 1 T sugar) and spoon into crust.
Roll out 2nd dough disk to 12-inch round and place atop pie filling. Crimp edges decoratively. Cut several slits to allow steam to escape. Sprinkle w/ remaining sugar.
Bake until crust is golden brown, apples are tender and juices bubble thickly, about 1 hour and 10 minutes. Cool 20 minutes before serving.