Fill a two quart pot with water and set on the stove on high. As the water heats, wash and half two limes. Juice the limes and add to the water. Toss in a sprig of mint. Bring to a boil and turn off the heat, allowing the pot to remain on the burner. If you'd like the beverage sweetened, add 1/2 cup of raw sugar and stir to dissolve. Once cool, strain into a pitcher.
This is like a virgin Mojito and so refreshing!