Northwest Frozen Blackberry Pie

A Bainbridge Island favorite from Marina!
Pie Crust:
1 ½ cups all-purpose flour
1 tsp salt
½ cup vegetable oil
2 Tbs milk
Mix flour and salt in a nine-inch pie pan, stirring with a fork. Combine oil and milk, blending well. Make a well in the center of the flour and pour in liquid. Mix all ingredients with a fork. Evenly pat dough to edges of pie pan.

Filling:
2 Bags (16 to 20 inches) Frozen Blackberries
6 Tbs tapioca
1 cup sugar
1 tsp salt
4 Tbs butter

Gently warm berries, sugar, salt, and tapioca in a saucepan for a couple of minutes, just to dissolve the sugar. Then pour into pie pan and place slices of butter on top. Bake at 450 degrees for 10 minutes, and at 350 degrees for 45 minutes. Cool. For best results, serve w/ ice cream.