This is one of my favorite refreshing summer drinks. Lemon verbena is tough to find in stores, so you'll have to grow your own. You can usually find starts at good nurseries, and it is pretty hardy. Mine dies back in our cold winter, but grows 3-4 feet tall again every summer! Its scent is just incredible - like lemon, but faintly minty... it's hard to describe, but it's just one of the best smells you can imagine.
Add 2 large (8-10") sprigs of lemon verbena to 1 quart boiling water in a 2-quart pitcher.
Add 2-4 Tbs of honey if you like your tea a little sweet.
Steep 5 minutes, then add ice and cold water to chill it quickly.