In a 9-inch pie pan, combine pecans, brown sugar, and butter. Spread evenly over bottom of pan. Place a bottom crust over the pecan mixture. Set aside. Preheat oven to 375F. In a large bowl, combine spples, sugar, flour, and cinnamon. Mix lightly. Spoon into crust lined pan. Top with remaining crust. Press together to see, flute edges. Cut slits in top of crust. Bake for 40 to 50 minuts or intil apples are tender and crust is golden brown. Cover edge of crust with strips of foil after 15 minutes to prevent excessive browning. Cool pie upright for 5 minutes. Place serving plate over pie; invert. Carefully remove pan. Some nuts may remain in pan; replace on pie. Cool at least 1 hour before serving.