We were introduced to this concept at a friends house and were transfixed by house delicious mint tea is! This is just the herb, no bags or anything added besides a little bit of sugar. This is a great picnic beverage.
Prepare in a quart pitcher that can withstand heat and cold:
handful of fresh mint leaves, bruised by crushing in your hands
3 TB raw cane sugar (like turbinado)
Pour in a few cups of filtered hot water and muddle with a spoon. Let cool a bit (so as to not shock the container). Then fill up the rest of the container with water and/or ice (in total I think you'll have a quart of water).
Chill and serve cold.