Place the cubed beef and halved potatoes in a 6-quart slow cooker.
In a medium bowl, whisk together the melted butter, minced garlic, thyme, oregano, salt, pepper, Worcestershire sauce, and beef broth.
Pour the mixture over the beef and potatoes, then toss until all pieces are well coated.
Cover and cook on low heat for 6 to 7 hours, or on high heat for 3 to 4 hours, until the beef is fork-tender.
Garnish with fresh chopped parsley and serve immediately.