How can something that tastes so good look sooooo creepy?  Even the cozy daylight-balanced produce-aisle lighting of Whole Foods can’t dispel the sense that something wicked this way comes whenever I get to the celery root bin.  Hieronymus Bosch, H.P. Lovecraft and Arcimboldo rolled into one beat-with-the-heebie-jeebie stick vegetable.  You know that scene in one …