Blueberry Pie Filling - cooking recipe

Ingredients

1 qt. blueberries
1 c. sugar
3/4 c. cold water
1 Tbsp. lemon juice
3 Tbsp. cornstarch
1/4 tsp. salt
2 Tbsp. butter (optional)

Preparation

Put blueberries, sugar, 1/2 cup water, lemon juice and salt in saucepan.
Bring to a boil.
Add cornstarch that has been dissolved in 1/4 cup water.
Cook until thick.
Cool.
Place in uncooked prepared pie crust.