Heat oven to 375 F. In a non-aluminum pan add butter, oil, chicken broth, wine, rosemary (2 sprigs) and pepper. Snip tops from garlic.
Bake uncovered until tender, basting every 15 minutes for approximately one hour. Add cheese to the broth and cook for approximately 10 minutes more. Discard the baked rosemary and garnish with fresh rosemary sprigs. Serves 12.