There is a recipe for suet dumplings on this page. You have to ask the butcher for the suet. It comes in a tube.
Same ingredients like a Shepards Pie but not in a casserole. All done in a pot.
Here, I didn't know it was called Lancashire potato hash. She didn't put flour in it and she added celery and spices I mentioned above. It doesn't take long. Maybe a half hour...