Fit piecrust into a 9-inch pieplate according to package directions; fold edges under, and crimp. Line pastry with aluminum foil, and fill with pie weights or dried beans.
Bake at 425° for 5 minutes. Remove weights and foil. Bake 2 more minutes or until light golden brown. Cool crust completely on a wire rack.
Pour Lemon Chess Pie Filling into piecrust. Bake at 350° for 50 minutes or until pie is firm, shielding edges to prevent excess browning, if needed. Cool completely on a wire rack.