Hard-boil the eggs, throw them into cold water, remove the shells, cut them lengthwise. Take out the yolks without breaking the whites. Rub the yolks through a sieve into a bowl, then add the tongue and all the seasoning. If the mixture is dry add a tablespoonful or two of cream or olive oil. Roll the mixture into balls that will fit the spaces from which they were taken in the whites, making each ball round. Arrange the lettuce over a platter, stand the whites in the lettuce, and at serving time baste thoroughly with French dressing.