Before my grandmother loss her ability to speak (aphasia condition caused by stroke) she told my mom that this can be used as remedy for cough. Just add it into any broth, chicken soup for example.
So I tried once, they make my chicken soup tastes a bit bitter. I don't know how to describe it accurately, bitter is not all (I blame my limited vocab). Though it looks like onion, but the taste is actually "radish-ish".