I posted this last week, during a trip. Of the guesses, one email came startlingly close: Right place, wrong fish.
Promised details on -- tada -- The Grocery will be here when our system decides to load it, and below are additional photos (though the fish is still the best). And as I noted, the photo gave you enough to suss out the place and the dish: A Google search at the time of "south carolina 'new restaurant' le creuset" produced the right restaurant as the first entry. (South Carolina would be a reasonable guess on where I was... the algorithm doesn't work now. Hmm.)
Details to come. (Want to hazard a guess? Comment. If you nail it, I'll have to devise a prize...)