Preheat oven to 350 degrees F (175 degrees C).Place chicken breasts in a 9x13 inch baking dish. Season with ground black pepper to taste. Top each breast with a slice of cheese.Mix together the soup and milk and pour mixture over chicken. Sprinkle bread crumbs on top and drizzle with melted butter/margarine. Bake covered in the preheated oven for 30 minutes. Uncover and bake for another 20 minutes or until golden brown.