Wiktionary
squab pie
n. A pie of a particular kind, containing mutton and apple.
Wikipedia
Squab pie
Squab pie is a traditional dish from South West England, with early records showing it was associated with Cornwall, Devon and Gloucestershire. Although the name suggests it contains squab (young domestic pigeon), in fact it contains mutton and apples. The pie was eaten around the world in the 1900s, though outside South West England it generally did contain pigeon. It is no longer a popular dish, with less than 3% of British teenagers surveyed having eaten it.