Bow Tie Pasta Salad

1 box bow tie pasta, cooked and cooled
1- 16 oz. spiral pasta (multi-colored kind)
20 oz. can pineapple tidbits, drained
1 c. celery, chopped
1 bunch green onions, chopped
2 cups red grapes, halved
1 small can cashew pieces
3 cups chicken breasts, cooked and diced (optional)
1 cup mayonnaise
12 oz. Lighthouse brand coleslaw salad dressing

Mix dressing and mayonnaise together for sauce. Add all other ingredients EXCEPT cashews and toss. Refrigerate for about an hour before serving. Add cashews right before serving.