01 -
Dice peeled russet potatoes until measuring 4 cups and 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 diced potatoes, diced onions, kosher salt, and black pepper. Cook, stirring occasionally, until onions soften and potatoes begin to brown, approximately 8 to 10 minutes.
03 -
Add diced corned beef, garlic powder, and onion powder to the skillet. Stir to combine all ingredients evenly.
04 -
Press the mixture down evenly with a spatula to form a flat layer. Cook undisturbed for 3 to 5 minutes until a golden crust forms on the bottom.
05 -
Scrape and flip the hash to transfer the crusty side up. Add the remaining 2 tablespoons of butter and mix thoroughly.
06 -
Press down again with the spatula and cook for another 3 to 5 minutes to brown the bottom. Repeat this flipping and browning step up to 3 times or until desired crustiness is achieved.
07 -
Garnish with fresh parsley if desired and serve immediately.