Fresh Blueberry Pie - cooking recipe

Ingredients

9-inch baked pastry shell
3/4 c. sugar
2 1/2 tsp. cornstarch
1/4 tsp. salt
2/3 c. water
3 c. fresh blueberries
2 Tbsp. butter
1 1/2 Tbsp. lemon juice
1 c. (1/2 pt.) heavy cream, whipped
2 Tbsp. confectioners sugar
1/2 tsp. vanilla extract

Preparation

Note:
I use Cool Whip for whipping cream.