Sift together flour, salt and cornstarch
Cut in half of the shortening with pastry blender or 2 knives until shortening is the size of peas, than cut in 2nd half of shortening until the size of peas...careful not to over mix
Carefully stir in ice water in a drizzle until mixture is moistened but still might be some dry pieces. Gently gather into a ball.
Heat oven to 425°
Roll ball in between wax paper, carefully peeling off paper to loosen dough to continue to roll into a circle.
Carefully put in pie tin, lifting with wax paper.
If baking the shell prick with fork all over so steam can escape while baking.
Bake for 8-12 minutes
Some people will mix the crust in a food processor, I've never done it for I've had good luck with pastry blender.
Can add different things to crust with the flour
½ c. shredded cheese
½ c. Toasted coconut
1 t. cinnamon sugar
Zest of lemon, orange, or lime
Finely chopped nut
Anything that sounds good