Or they call it popcorn. But never do they reveal its true name. Well, it's time to spill the beans - or rather rice. These distant cousins of the sandwich are quick, cheap, satisfyingly starchy and piquant, and hugely popular in Japan. Start with our favorites - spicy tuna, spicy cod roe, or salmon.
Adventurous palettes can learn to love the tangy plum paste and marinated kelp.