Very Blueberry Pie

¼ cup of cold water
5 tablespoons of all-purpose flour
1 pinch of salt
4 cups of fresh blueberries
1 cup of sugar
½ cup of water
1 baked 9 inch pie shell.

Make smooth paste of the water, flour and salt.
Boil 1 cup of the blueberries with sugar and water.
Add the flour paste and stir until it thickens.
Remove from the stove and cool.
When cool, add the remaining blueberries and put into baked pie shell.
Refrigerate.
When cold, garnish with sweetened whipped cream or whipped topping.