Cut off top of bread. Carefully hollow out bottom of loaf, leaving a 1/2-in. shell. Cut removed bread into small cubes; set aside. In a skillet, brown meat. Add soup, green pepper, celery, worestershire sauce, salt and pepper. Cook and stir for 3 to 4 minutes. Stir in the reserved bread cubes. Spread into bread shell. Top with cheese. Replace bread top. Place on an ungreased baking sheet. Bake at 350 degrees for 6 to 8 minutes or until cheese is melted.