I'm hoping someone here can help me...
I lived in Bangkok for seven months and wound up seriously addicted to the noodle soup you can buy (for like 50 cents) from street vendors. It's called Kway Tiaow Nam, though in my experience you just asked for it according to how you like it.
So I'd order "Sen Lek Nam," meaning medium-thin rice noodles in broth. It would come with fish balls or other meat balls, sliced meat, bean sprouts, cilantro, etc. - served with the ubiquitous little tray of condiments (fish sauce, sugar, chilis, peanuts...). It's your basic Bangkok street food, and absolutely delicious.
I've found this dish, perfectly well done, in San Francisco and Amsterdam - but for the life of me I can't find it in New York. Does anyone know somewhere in NYC I can find it?