This is meant for literally any leftover meat, and because everything goes in already cooked it should work for anything: chicken, beef, pork, even fish. It is especially good, however, with beef roast over a grill using a Worcestershire-based barbecue sauce!
The vegetables listed are vegetables that can accompany any kind of meat, but depending on what meat you’re using, you may well add any other leftover vegetables in your fridge. This could just as well be called “leftovers pie”. Anything you have leftover in the fridge is fair game.
Any pie crust should work, although I’d prefer a whole wheat crust on a beef pie. For that matter, you could cover it in biscuit dough or cornbread batter, or mashed potatoes.
Mashed potatoes cover any number of sins.
The way to a man’s heart may be through his stomach, but don’t forget that the quickest way to his stomach is pie. — Imperial Sugar Company (Romantic Recipes of the Old South and the Great Southwest)