It pairs two ingredients most people would never think to combine into a bread — mashed potato and sliced apple, griddled together into one farl.
Leftover mashed potato is worked into a dough with flour and butter, layered with sliced apple, folded, and cooked on a hot griddle until the outside chars and the apple inside softens. It's a traditional Ulster farmhouse food that market stalls in Donegal still sell warm, split and buttered.