Wash the potatoes thoroughly and peel them.
Boil the potatoes in boiling water.
Let the boiled potatoes cool, then mash them.
Slice cucumber and carrot thinly.
Boil the eggs, peel them, and chop finely.
Put potatoes, cucumber, carrot, and eggs in a bowl, then mix with mayonnaise, salt, and pepper.
Serve the finished potato salad in a dish.