Fresh Blueberry Filling

1/4 c. sugar

1/8 tsp. salt

1/2 c. water

2 T. cornstarch

3 c. fresh or frozen blueberries

Combine sugar, salt and water in a pot over low heat; stir until the sugar and salt are dissolved. Add cornstarch and blueberries, stirring continuously, and cook until thickened, about 10 minutes. Remove from heat and allow to cool. The mixture will get a little thicker as it cools.