Take your water and put it in a medium saucepan over medium heat, while stirring in the sugar until dissolved. Add the blueberries and boil for several minutes. Reduce heat and wait until the blueberries have broken down. Put through a sieve and strain. Let cool.
One you have brewed your tea over ice, add some blueberry simple syrup and a fresh sprig of mint. You can add more ice and a few frozen blueberries.
Notes
Nutrition is for 1 tablespoon of simple syrup. Mix up flavored tea with this syrup all summer long.