Mashed potato served with Frankfurter Rippchen, sauerkraut and mustard Mashed potato could be served for a side dish. during the British Isles, sausages served with mashed potatoes are often known as bangers and mash. A plate of sausage and mashed potatoes, with cabbage and onion gravy, normally often known as "bangers and mash" 1 French variatio