I suspect I'm posting a day late for your Sunday night
dinner, but there's an excellent Thai restaurant, Siam
Sea Grill, on the main drag in Port Chester. The
cooking is several notches above the typical Thai fare
and features a superb take on bouillabaisse. The
restaurant is located on route 1 (Main St) a few
blocks before the old Lifesaver factory.
BTW, Port Chester is a Latin food jackpot -- there are
several good Mexican, Dominican, Brazilian and
Peruvian restaurants and they're all cheap. Also,
Pat's Hubba Hubba (also on Main St) is THE place for
the greasiest, nastiest, funkiest and therefore
greatest chilidogs and chilifries -- if you go for
that kind of thing. And they're open real late...