Boil the potatoes and peel them. Cut them into slices. Julienne the fillet and braise briefly in heated oil. Season with salt.
Arrange the potatoes at both ends of a suitable oven dish and put the chicken meat in the middle. Sprinkle with oil and bake in a preheated oven for about 15 min.
Beat the eggs with the mayonnaise. Pour this over the potatoes and chicken and bake until golden. Sprinkle with marjoram and rosemary.