Potato Croquettes

To a cupful of mashed potato add half a level teaspoonful of salt, a few grains of pepper, onion juice, a tablespoonful of cream, half a teaspoonful of chopped parsley, and the yolk of an egg. Beat all together till fluffy and light. Form into balls, dip in beaten egg and roll in nicely browned bread crumbs which have been rolled very fine, and fry to a delicate brown in hot fat.