Wash potatoes (do not peel!) and place in a pot of cold water.

Bring potatoes to a boil and cook until tender (test the biggest one with a sharp knife introduced in the middle).

Drain and let cool down enough to handle.

Peel potatoes and place in the same pot or a bowl.

Mash using a potato masher or a potato ricer.

Heat up vegetable stock (or make it in hot water if using cubes or powder), add to the potatoes and mix well.

Add extra virgin olive oil and salt, mix well and adjust seasoning to taste.