Scrub or scrape the potatoes and dry them well. Melt the butter in a pan wide enough to take all the potatoes in one layer. Add the potatoes and stir, turning them so that they are well coated with butter.
Cover the pan with a lid and allow the potatoes to cook gently over low heat for 20–30 minutes. Shake the pan occasionally until the potatoes are crisp and golden outside and soft ins