Combine and set aside:
2 tsp. cornstarch
2 tsp. water
1 tsp. lemon juiceBoil until they pop:
1 cup fresh blueberries
5 T. waterAdd to the cooked berries, and heat until thickened:
1 T. butter
3/4 cup sugar
pinch salt
cornstarch mixtureRemove from heat and add 3 cups fresh berries.
Pour into baked pie shell.