Cook Rotini according to package directions. Drain, cover and set aside. In large bowl combine cooked pasta, deli meat, pineapple, oranges, celery and green onions. Add dressing; toss to coat. If desired, sprinkle with walnuts. To Toast Walnuts: Preheat oven to 375°. Spread nuts on cookie sheet. Bake 8 to 10 minutes or until lightly browned. Recipe provided by National Pasta Association.