A 'farl' isn't a recipe — it's a shape: the word simply means a quarter, from how the round of dough is cut into four triangles before it hits the griddle.
Buttermilk soda bread dough is patted into a round, scored into quarters, and fried on a flat griddle alongside bacon and eggs until the outside is charred and the inside stays soft. Market cafes and takeaway vans serve the wedges split and buttered, or stacked into a fry-up roll.