Place bread cubes in a large bowl; set aside. In a saucepan, saute onion and celery in butter until tender. Add water, sage, bouillon, salt and pepper. Pour over bread and toss. Spoon stuffing into eight mounds in a greased 13-in. x 9-in. baking dish. Place a pork chop over each mound. Sprinkle with Worcestershire sauce if desired. Cover and bake at 325° for 25 minutes. Uncover; bake 30 minutes longer or until meat juices run clear. garnish with parsley if desired.