There used to be a dig called "Crispy Canoe's" between Broad St & Broadway. They had great unique and most importantly tasty sandwiches there. There's also Wall Street Bar & Grill, better yet, Delmonicos next to Goldman Sachs if you need more classy. Otherwise, pickens do tend to be scarce for some reason down there. Tribeca is a short few stops from there... Tribeca Grill is a personal fav... Otherwise it's the usual BS overpriced establishments down there (ie. Mangia, Cosi, Europa) and of course starbucks on all four corners of the same intersection... WTF SBUX! MAK!
Yum. There's also a Roy's of Hawaii just behind it on Washington. Of course, the Amish Market was taken out but I think they moved south near Battery Park. Also, don't miss Nam to the north.