Put first 8 ingredients in slow cooker. Cover and cook on low for 10-12 hours. Remove roast and let cool. Shred beef with a big fork.

 

Mix a generous amount of garlic powder with a sprinkle of parsley into the softened butter and spread on toasted rolls. Top with shredded beef and provolone, and bake or toast in toaster oven until the cheese melts. Put the leftover au jus into small bowls for dunking.