There's this place on Mulberry St., right near the Golden Buddha Supply store down near Columbus Park (right side of the street, if you face toward the part) that has this strange but absolutely wonderful peking duck sandwich.
I've only had it once, but it's a piece of fall-apart, sauce-drenched duck, plenty of skin, with some sort of mild cucumber pickle and letuce stuffed between two pieces of what I can only described as round steamed bread. Totally delicious. I think it was less than $10.
If anyone comes up with the restaurant name, I'd love to heard about it. I think it's Vietnamese.