Peel the potatoes and cut roughly into 1.5 centimetre or half inch cubes. Put the potatoes on some kitchen towel or a clean tea towel in a single layer for 5 minutes.
Peel and chop the shallot and parsley.
Heat the oil in a frying pan or skillet over a medium heat. Add the potatoes in a single layer.
Cook for about 15 minutes, turning a few times, so that the potatoes are browned all over.
Add the butter, shallots and seasoning. Remove from the heat and stir to combine.
Pile the fried potato cubes into a serving dish and scatter over the chopped parsley to serve.