Rhubarb Iced Tea

Bring 4 cups of water to a boil. Add rhubarb, cover, and simmer for 30 minutes. Remove from heat. Stir in tea bags and mint leaves. Cover and let steep for 30 minutes. Combine sugar and lemon juice in a pitcher. Strain rhubarb and tea mixture over the sugar. Discard the solids. Using a wooden spoon, stir tea until sugar has dissolved. Add remaining 4 cups of water to the pitcher and stir again. Serve over ice.