Going to be growing some of these this year in the Casa Margherita vegetable garden. I had a plate of them the other day for the first time ever. They are eaten like a salad both the roots and the leaves. They are a bit like radish but not strong. They look great on a plate and are quite different.
In english they are called rampion whilst in german they are called rapunzel which was the heroine of one of the Brothers Grimm fairy tales.