In a blender add blueberries, mint, and lemon juice. Blend until smooth and deep purple. The mixture will look a bit like a smoothie.
Pour mixture into a fine mesh strainer placed over a medium bowl. Use a spatula to press the liquid through the strainer leaving the blueberry pulp and fresh mint in the strainer. Discard the pulp.
Pour the blueberry, mint, lemon juice into a pitcher, add water and Stevia to taste. Serve chilled.
2 cups fresh blueberries (frozen will also work)
1 cup mint leaves (or one big handful, a few stems are fine too, coarsely chopped)
1 ½ cups fresh lemon juice
Stevia to taste
5 cups water