4 c. fresh blueberries
1/2 c. brown sugar
1/2 c. white sugar
1 c. water
1 tsp. lemon juice
4 tbsp. cornstarch
1/2 tsp. salt
1/2 tsp. cinnamon
1 baked 9-inch pie shell

Combine 1 cup blueberries along with rest of the ingredients in a saucepan. Bring to a boil and cook until mixture thickens. Then add the rest of the blueberries (3 cups). Mix together and pour into a baked pie shell. Chill. Serve with whipped cream.