Platycodon grandiflorus (balloon flower), an important vegetable in the Far East, is just starting to flower in the garden. In Korea, it is called doraji. Its root, either dried or fresh, is used in salads and traditional cooked dishes. Young leaves are also used.
See also this video from a doraji farm in Korea: https://www.youtube.com/watch?v=F7OA9AsZAs0