Place the herbs in a glass quart jar. Fill the jar with boiling water.
Steep for at least four hours; More is fine. Overnight is fine.
Strain herb from the water with a cheesecloth. (You can use an old white T-shirt as well.) Add salt if desired.
Compost the herbs and drink the infusion. Refrigerating and then drinking cold is great but finish it within a day or two lest it ferment.