Here is the basic recipe for making the vinegared rice essential to all sushi recipes. There are three keys to achieving the best taste and texture: (1) Use short-grained rice, preferably the Japanese-style rice grown in California (Ko-kuho Rose, Blue Rose, and Kotobuki are among the most readily available brands). (2) Use freshly cooked rice, still warm and therefore more receptive to absorbing the seasoned vinegar. (3) Do not refrigerate the seasoned rice. S