Cut lengthwise slice from top of bread loaf, remove center, leaving 1-inch thick shell. Cut removed bread into bite-sized pieces; set aside. Mix remaining ingredients in small bowl. Spoon into hollowed bread shell. Cover shell with top of bread; place on cookie sheet. Bake at 350 degrees for 1 hour. Garnish with leaf lettuce. Serve with bread pieces and crackers. Makes 3 1/2 cups..