UPDATED WITH EVEN MORE HINTS!
Everyone who's guessed wrong (which is everybody) can try again.
This one needs at least this hint: The Costa Mesa restaurant that served this no longer exists. And when it did, it only appeared at night. So where did I eat this dish?
No Weeklings allowed to play. One guess per person, per comment. And as always, enter a valid e-mail so we can verify the winner, yadda yadda.