Thailand's calling card to the rest of the culinary world, pad Thai doesn't need an introduction. There are an infinite number of variations on this timeless tradition, but usually noodles are dressed up with tofu, bean sprouts, onion, and the brilliant final touch: peanuts ground to near dust. Pad Thai is a diner-participation meal; you put on the finishing touches of fish sauce, sugar, chili powder, and crushed peanuts to suit your taste.