I don't know if this is the traditional recipe but this is how I make 'em!

Stovies

You need:

Potatoes
Onion
Stock
Left over meat (any roast meat is great)

First slice and fry off the onion until soft, throw in the potatoes and add stock (about an inch or two). Cover the pot and watch to make sure it doesn't boil dry. Simmer until the potatoes break down and add the left over meat.

I'm sure there is a better described recipe out there on the interwebs, you can substitute the meat for corned beef or sausages.