Combine pecans, br. Sugar and margarine in a 9" pie pan. Spread evenly over bottom of pan. Place pie crust over pecan mixture. In a large bowl, combine apples, sugar, flour, cinnamon, and nutmeg. Spoon into crust-lined pan. Top with remaining crust. Fold edge of top crust under bottom crust. Press together to seal. Flute edge. Cut slits in top crust. Bake 375 for 40-50 minutes. Cover edge of crust with strips of foil after 15-20 minutes of baking time to prevent excessive browning. Cool pie upright for 5 minutes. Place serving plate over pie; invert. Carefully remove pan. Cool at least 1 hour before serving.