Heat the vegetable oil in a large skillet over medium heat.

Add the diced onions and cook until they are translucent, about 5 minutes.

Stir in the diced potatoes and cook until they are golden brown and crispy, about 10-15 minutes.

Add the corned beef to the skillet and mix well. Cook for an additional 10 minutes, allowing the beef to crisp up.

Season with salt and pepper to taste. Stir well to combine.

Garnish with fresh parsley before serving.