Boil the potatoes and drain them well (make sure they are not watery).

While the potatoes are cooking, fry the chorizo and set aside.

Chop the half onion and add it to a pan with a little oil and fry.

While the onion becomes translucent, chop the potatoes into cubes.

Add the potatoes to the onions.

Fry everything together for a bit, stirring, then add the chorizo.

If necessary, add more salt and oil to taste, stir a little, and it's all ready!