Measure out the required amount of ingredients, wash the vegetables and eggs. Open the canned fish.
Boil potatoes, carrots and eggs. Using a coarse grater, grate the carrots, potatoes, and cheese into separate containers. On a fine grater, grate the white and yolk separately. Finely chop the onion
Place the canned mackerel and sardine from the cans onto a plate and mash with a fork.
Take a deep container to form a salad in it. Place a layer of potatoes on the bottom and coat with mayonnaise. Place a layer of onion on top, then a layer of cheese, again brush with mayonnaise. Place a layer of fish, do not lubricate it with mayonnaise. Next comes a layer of egg whites, mayonnaise and carrots, again mayonnaise and a layer of egg yolks.
Serve this salad after chilling it in the refrigerator for 30 minutes. This way the dish will sit and soak into the adjacent layers. Using a knife or spatula, cut off the required amount and place on a flat plate, garnish with herbs. A piece of toasted bread completes the dish.