To Make Ahead: Wrap unbaked pie tightly, label and freeze no longer than 1 month. About 2 1/4 hours before serving, heat oven to 400°F. Unwrap and re-cover with aluminum foil. Bake about 2 hours or until hot in center. Let stand 10 minutes before cutting.
It's a snap to make the pasta shell! Spoon the fettuccine mixture into the pie plate, and then press firmly with another pie plate.