01 -
Dice peeled russet potatoes to measure 4 cups. Boil in water for 5 to 10 minutes until fork tender. Drain thoroughly.
02 -
In a large skillet over medium heat, melt 4 tablespoons of unsalted butter. Add the boiled potatoes, diced onion, kosher salt, and black pepper. Cook, stirring occasionally, until onions soften and potatoes start to brown, about 8 to 10 minutes.
03 -
Incorporate chopped corned beef, garlic powder, and onion powder into the skillet. Stir well to combine.
04 -
Press the mixture evenly into the pan using the back of a spatula. Cook undisturbed for 3 to 5 minutes until a golden crust forms on the bottom.
05 -
Scrape the bottom edges and flip the hash so the crusty side is on top. Add any remaining butter and mix it in evenly.
06 -
Press the hash down again into an even layer. Cook for another 3 to 5 minutes until golden. Repeat the flipping and browning cycle two more times or until desired crust is achieved.
07 -
Remove from heat and garnish with fresh parsley if desired. Serve immediately.