to answer your question without entering into any (somewhat ridiculous and waaay off-topic) fray, just ask. LapLap's suggestion to do it in person if at all possible was excellent, but even if you can't, be sure to phrase as she suggested in terms of making it flattering to the restaurant/chef and i'd be surprised if you were denied.

not that you would, but don't go off on any tangents...just flatter and ask the question.

hey, worst thing they can do is say 'no.' whatever happens, please do post here so we know the outcome.

good luck. ^