Sift together flour and salt.
Cut in margarine until like coarse cornmeal.
Add egg and toss with fork to mix.
Gather into a ball, wrap in plastic wrap and chill for
about an hour.
Roll out on well floured board.
Fit into a 10" pie pan. Trim 1" wider than pan.
Fold over and press firmly against pan. Flute edges.
For pre-baked pastry bake at 350º for 20 to 30 minutes .
Cut a circle of aluminum foil, with inside cut out, and place over outer edge of pie pan, if needed to keep crust from browning too fast, or use a pie crust shield.
Pastry can be frozen in pie pan, covered with Saran
Wrap and foil until ready to use. Makes one crust.
Double if two crust pie is made.