01 - Heat 1 tablespoon of oil or butter in a large skillet over medium-high heat. Add the diced potatoes and season with salt and pepper. Cook, stirring occasionally, until potatoes are golden and crispy, about 10–12 minutes.
02 - Push potatoes to one side of the skillet. Add the remaining oil, then sauté onion and bell peppers until softened, about 4–5 minutes.
03 - Stir in the corned beef, garlic powder, and smoked paprika. Mix all ingredients together and cook, pressing the mixture down lightly with a spatula. Allow to cook undisturbed for 3–4 minutes to develop a crispy crust.
04 - Stir the hash, then repeat pressing and crisping for another 2–3 minutes until desired crispiness is achieved. Taste and adjust seasoning if needed.
05 - Make 4 small wells in the hash if adding eggs. Crack an egg into each well, cover the skillet, and cook for 3–5 minutes or until eggs are done to your liking.
06 - Garnish with chopped parsley and serve hot.