Peel the potatoes and cut them into large chunks weighing 40–50g (1½–1¾ oz) each. Wash the chunks in cold water and put them in a large saucepan. Cover with cold water, season with salt and put over a moderate heat. Bring to the boil and cook for 20 minutes. The potatoes are done when you can pierce them easily with a small knife. Don’t overcook them as they will absorb