It's a very easy way to add a slightly different taste to a meal that is already made.
Corned Beef, chopped into a small dice
Potatoes, chopped into a small dice
Salt and Pepper
(I left the amounts blank intentionally because the idea is to use up what you have leftover. Given whatever amount you have on hand, I would suggest using approximately equal amounts of corned beef and potatoes. For the onions, I would suggest using half the amount of the potatoes.)
Obviously, I was not very concerned about making the chopped pieces very uniform - let's call it rustic.
2-3 Tbsp butter
1 cup onions, diced
2-3 cups corned beef, diced
2-3 cups potatoes, diced
Salt and Pepper, to taste
Melt butter in a large skillet (cast iron, if you have one) on medium heat. Add the onions cook until they are translucent.
Add the mixture of corned beef and potatoes and spread out in a single layer in the pan. Turn the heat up to med-high. Press mixture down with a spatula to get the most contact with the pan.
Fight the urge to stir and leave the mixture alone so it browns. You are going for the crunchy browning of the potatoes. You should hear sizzling. You can use the spatula to peek at one side of the mixture to check for browning. When the first side browns, flip the mixture to brown the other side. Add a bit more butter to the pan, if necessary. Continue to cook until both sides are browned to your liking.