Fit pastry into a 9-inch pieplate according to package directions; fold edges under, and crimp. Line piecrust with aluminum foil, and fill with pie weights or dried beans.
Bake at 425° for 7 minutes. Remove weights and foil, and bake 4 more minutes. Reduce oven temperature to 350°.
Whisk together sugar and next 6 ingredients until blended. Add eggs, whisking well. Pour mixture into prepared piecrust.
Bake at 350° for 50 to 55 minutes or until golden, shielding edges with aluminum foil to prevent excessive browning, if necessary. Cool completely on a wire rack. Serve with whipped cream, if desired. Garnish, if desired.