Puree blueberries with the lemon juice. Pour puree into a fine sieve set over a bowl. Discard pulp or save for your next fruit smoothie. Add 1?½ cups Mint Syrup and 2 cups cold filtered water. Mint Syrup Bring sugar or honey, mint, and 2-1/2 cups water to a boil over medium heat. Cook until the sugar/honey has completely dissolved, about 1 minute. Remove from heat. Let stand 30 minutes. Pour into a fine sieve set over a bowl, and discard mint. This syrup can be refrigerated for up to 2 months.