Wash the potatoes thoroughly, peel them, and cut into appropriate sizes.
Put the potatoes in a pot and boil them in water until cooked.
Drain the boiled potatoes, place them in a bowl, and mash them.
Slice the cucumber and carrot thinly.
Boil the eggs, separate the whites and yolks, then chop them finely.
Add the cucumber, carrot, egg, mayonnaise, salt, and pepper to the mashed potatoes and mix well.
Transfer to a serving dish and serve.