Makes 1 gallon Ingredients 1 pound rhubarb, ends trimmed and cut into ½ inch pieces 1 teaspoon lemon zest 2 tablespoons lemon juice ½ cup fresh mint leaves 1 cup sugar 2 cups water Ice Seltzer water Directions Combine the rhubarb, lemon zest, lemon juice, mint, sugar and the water in a medium saucepan and…