Bring the water to a boil and steep the tea bags for five minutes.
Meanwhile, combine the simple syrup (1:1 ratio of sugar melted in hot water), ice, lemon juice and zest to a blender and pulse until smooth. Transfer the mixture to the freezer.
When the tea has finished steeping, serve it in a glass over ice. Add half a cup of the lemon blend and stir.
Recipe serves 6