You’ll Need:1 (6 to 8 pound) turkey or chicken 1/2 cup butter or margarine 1 cup onions, chopped 1 cup celery, chopped 1 cup parsley, chopped 1 1/2 quarts (6 cups) bread cubes, 1/2 inch l teaspoon salt 1/2 teaspoon thyme I egg, slightly beaten 1/2 cup Dr. Pepper (plus