From The Victorian Kitchen by Jennifer Davies, originally from A Plain Cookery Book for the Working Classes by Charles E. Francatelli, 1861 - so pretty tried and tested.
2 onions, pepper, salt, 1 pint water, cold meat thinly sliced, a little flour.
Chop onions fine, boil with pepper and salt in pint of water for ten minutes, throw in meat cut in thin slices, mixed with a little flour. Boil all together for a further ten minutes and pour the hash into a dish containing either some boiled potatoes, or else some slices of toasted bread.
Bon appetit