I've heard that too, Mrrzy - that it's used by vegetarians to replace the lamb shank. But I find teaching religion as a Catholic (and in studying folksongs), that there are often many backstories to traditions, and they all have a certain level of validity. Yes, there may be one story or incident that is the root of the tradition, but that doesn't invalidate all the others.

In contrast to a lot of religious people. I rarely put a whole lot of emphasis on Truth - I'm far more interested in the Story, because that's the human side of it. My approach invariably gets me into trouble. But hey, it's "good trouble."

-Joe Offer, fuzzy logician-