Blueberry Pie

1/4 c. cold water
4 c. blueberries
1/2 c. water
5 T. flour
1 c. sugar
Baked 9 inch pie shell

Make a smooth paste with 1/4 c. cold water, flour, and salt. Boil 1 c. blueberries with sugar and 1/2 c. water. Add flour paste and stir until thickened. Remover from heat and cool. Add remaining blueberries, put into baked pie shell. Refrigerate. Serve cold, garnished with sweetened whipped cream or whipped topping.