Lettuce-Wrapped Oyster Beef

Chinese, like most other people, have a penchant for wrapping one thing inside another and then eating it. Mandarin pancakes, spring-rolls, dumplings, and lettuce-wrapped dishes such as this one are all part of the passion for wrapping. (From whence this passion stems I do not know, but that it is a matter far more interesting than mere convenience or neatness I am certain. Otherwise, a hot dog without its bun, or mu-shu pork without its pancake would not seem so sad, so deprived, an