Use two rounding tablespoons of grated cheese, a
rounding tablespoon of butter, one-quarter cup of fine breadcrumbs, the
same of milk, and a saltspoon each of mustard and salt, the yolk of one
egg. Cook the crumbs in the milk until soft, add the stiffly beaten
white of the egg. Fill china ramekins two-thirds full and bake five
minutes. Serve immediately.