Chop the raw livers and rub through a sieve. Place them in a pan and add butter and onion, cook 5 minutes and remove from stove to cool, add the seasonings, 5 egg yolks, bread crumbs and mix. Beat the whites to a stiff froth and add to the mixture. Grease the timbale forms and sprinkle with bread crumbs and bake, at once in pan half filled