A bumper crop of rhubarb and mint from my garden inspired me to create this thirst-quenching pick-me-up. Raspberries deepen the tea's vibrant red color, making the drinks a pretty addition to your table. —Laurie Bock, Lynden, Washington
In a 6-qt. stockpot, combine rhubarb, raspberries, mint and water; bring to a boil. Reduce heat; simmer, uncovered, 30 minutes. Remove from heat. Add tea bags; steep, covered, 3-5 minutes according to taste. Using a fine mesh strainer, strain tea, discarding tea bags and pulp. Stir in sugar until dissolved; cool slightly. Transfer to a pitcher; refrigerate until cooled completely. Serve over ice with mint sprigs.