Salt and pepper wings. Bake wings on a lightly greased cookie sheet at 350° until tender and juices run clear (about 20 - 30 minutes). Over low heat, mix mustard, brown sugar, pepper, vinegar and minced onion. Bring to a slow boil and reduce heat. Baste wings on one side with sauce and return to oven for about 5 minutes. Baste wings on the side and return to oven for 5 additional minutes. Depending on taste, repeat this step.