Cold Rhubarb Tea

4 c Water
4 c Rhubarb stalks with red skin, unpeeled and diced
3/4 c Sugar
juice of 1 Lemon or orange;
zest of 1 Lemon or orange

Simmer rhubarb in water until very tender, about 20 minutes. Strain.
Add juice, zest (rind), and sugar. Stir until sugar has dissolved.
Cool well and serve over ice in tall, clear glasses.