Cottage pie is a traditional British dish made with minced beef or lamb, mixed with vegetables such as carrots, peas, and onions, and topped with a layer of mashed potatoes. It is similar to shepherd's pie, but cottage pie uses beef or lamb instead of minced lamb. The meat and vegetables are cooked together in a rich gravy, and the mashed potatoes are spread over the top and baked until golden and crispy. Cottage pie is a comforting and filling meal that is perfect for a quick and easy dinner.