A Scotch pie or mutton pie is a small, double-crust meat pie filled with minced mutton or other meat. It may also be known as a shell pie or mince pie (although the latter term is ambiguous) to differentiate it from other varieties of savoury pie, such as the steak pie, steak and kidney pie, steak-and-tattie (potato) pie, and so forth. The Scotch pie is believed to originate in Scotland, but can be found in other parts of the United Kingdom, and is widely sold all over Canada.