Cold Beef Shabu-Shabu with Creamy Sesame Dressing

Shabu-shabu is a dish in which paper-thin slices of beef are cooked in simmering water at the dinner table by the diners. If you see beef cut for shabu-shabu in a Japanese market, you will be amazed at how highly marbled with fat the meat is. The better the quality of shabu-shabu beef, the more fat you will see scattered through the meat slices. This fat, which is partially melted away in the boiling water, determines the flavor and textural qualities of the beef. The m