1. Preheat oven to 350°F. Place French Fried Onions in plastic bag. Press with rolling pin until onions are lightly crushed. Transfer to sheet of waxed paper.
2. Spread mustard evenly on chicken. Coat with onion crumbs; pressing gently to adhere.
3. Place in baking pan. Bake 20 minutes or until chicken is no longer pink in center.