Sushi has entered the mainstream of American dining. It's available just about everywhere--at upscale Japanese restaurants, fast food counters, delis, even supermarkets. It's the hors d'oeuvre to serve at parties and receptions, and a quick, satisfying lunch to bring back to the office on a busy work day. The more that people enjoy sushi when they dine out, the more they want to learn to make it themselves and serve it at home. With easy-to-follow...