Wash the potatoes thoroughly, peel them, and cut into bite-sized pieces.
Put the potatoes in a pot, add water and a bit of salt, and boil them.
Once the potatoes are cooked, drain the water and mash them in a bowl.
Finely chop cucumber and carrot.
Add corn, cucumber, carrot, salt, and pepper to the potatoes and mix well.
Add olive oil and lemon juice, then mix again.
Taste and adjust seasoning with salt and pepper as needed.