I bought these roots at Price Chopper the other day. They were right next to the parsnips, and no one in the produce department could tell me what they were (and the cashier rang them up as "parsnips" so she was just as clueless as everyone else.). I bought them because they're so cool-looking - kind of square in cross-section, with little root nubbins along the "corners" which give it a distinctively grub-like look.
I haven't done anything with them as of yet, because...well, because I'm not sure what to do. I did take a slice off on one to taste it. It has a wet, refreshingly crispy texture very similar to a water chestnut, but without the water-chestnut bitterness. The flavor was pretty neutral, but with a gentle nutty undertone.
So...WHAT ARE THEY? Help a brother out here - I think they might be jerusalem artichokes or sunchokes, but I'm not familiar enough with them to tell for sure. If you have any ideas, put 'em in the comments.