Mix the corned beef, hash browns and onion in a large bowl.
Add parsley, salt and pepper.
Heat oil and butter in a nonstick skillet over medium heat.
When pan is hot, add the hash mixture and spread out evenly.
Cook until the potatoes are done and browned on the bottom, about 10 minutes.
Flip the hash over and continue cooking until browned, about 8 minutes.
Serve topped with eggs of your choice, additional chopped parsley and sliced green onions.