Combine 1/2 c. water, sugar ... stir into hot blueberry mixture until thickened. Stir in ... Refrigerate. When cold, top with Cool Whip. Note: You ... cooled filling into shell.
Combine Blueberries, 1 cup sugar ... Fold in whipped topping evenly over cooled crust. Pour blueberry mixture evenly over top. Refrigerate cut into squares to serve.