Blueberry Sauce for Cheese Cake

Bring to a boil in heavy pan or in microwave heat to boil:

1 c sugar            1 qt blueberries            1 c water   3 T butter

Add 3 T cornstarch to ½ c cool water and mix until no lumps are left.

Add to hot mixture. Cook until thick and clear. Stirring constantly if on stove top.