I tried it once Nipper but not exactly successfully. I found the roots too small and fiddly to be worth cleaning and ended up pulling it out.
It does taste quite nice, but the leaves are a bit coarse, so I only ate the root. Maybe if you fed & watered it well the root would swell up more. I admit, I chucked the seeds in and apart from a bit of thinning and weeding, I left them to it.