Chocolate Pie

We love chocolate pie! Especially on holidays.  We girls often teased Grandma about the time that we were about to eat the last piece and she took it away from us to save it for Wesley (because boys were her favorite).
 This recipe came from her work as a cook at the Channel Islands School Cafeteria.

Pastry
1 1/2 cup flour
1/2 cup shortening
1/2 tsp. salt
2-3 Tbsp. water

Filling
3/4 cup corn starch
1 1/2 cup sugar
1/2 cup cocoa
6 1/2 cups water
1 2/3 cup powdered milk
2 tsp. vanilla
1/2 tsp. salt
4 Tbsp. margarine