Add the 1 tablespoon of butter to your crockpot and turn it on high to melt. Cut up your meat and add it to the crock, swirling it into the butter to coat. Add the chopped peppers, onion, and garlic. Add the Worcestershire, salt and pepper. Stir in the beef broth and milk.Cover and cook on low for 7-9 hours, or on high for 5-6. The soup is done when the meat has reached the desired tenderness.Before serving, stir in the provolone cheese. It will melt in stringy chunks---yum.