This hearty dish transforms leftover corned beef into a crispy, savory breakfast. Deeply caramelized onions add a layer of sweet complexity, making it a special and comforting meal. It’s perfect for a lazy weekend brunch or a cozy dinner.
For best results, use a heavy skillet like cast iron. Par-cooking the potatoes ensures they cook through and get crispy. Do not rush the caramelization of the onions. Leftover hash can be stored in the fridge for up to 4 days and reheated in a skillet.