Most UNIQUE dish in d.c.?
Something that was puzzling you on the plate with taste to boot...
I remember thinking the foie gras soup at Cafe Atlantico was pretty unique. Had never had anything like it and wasn't sure if it would work (thought the taste would be too powerful and too rich) but it was great!
Had lunch at Zenga last week which is fusion Asian and Latin. I had fish in a spicy latin-based flavored broth with Asian vegetables. Bizarre.