1 baked pie shell
4 c. blueberries
1 c. sugar
3 tbsp. cornstarch
1/4 tsp. salt
1/4 c. water
1 tbsp. butter

Cook 2 cups blueberries with sugar, salt, cornstarch and water over medium heat until thickened. Remove from heat, add butter and cool. Put remaining 2 cups berries in baked pie shell and pour sauce over all. May serve plain or topped with whipped cream.