The classic dish Veal Oscar is reputedly named for a Scandinavian king. This version, using chicken instead of veal and topped with crab, asparagus, and a velvety butter sauce, has royal cachet. NOTE: Up to 6 hours ahead, pound chicken; cover and chill. Cook asparagus, drain, chill at once in ice water, then drain again. Immerse in simmering water for 1 to 2 minutes to reheat.