Savory and Sweet Pasta Salad

24 oz pasta shells
20 oz pineapple tidbits
2 cups chopped celery
4 or 5 scallions or green onions
1 cup half or pieces cashews
1 1/2 cups halved red grapes
4 single chicken breasts, cooked and cubed

Dressing (whisk together)
1 cup mayonnaise
1 (16 oz) bottle Kraft coleslaw salad dressing

Cook pasta according to directions on package. Rinse with cold water and drain. Add all other ingredients; toss lightly. Coat with dressing and refrigerate until cold. Serve on red leaf lettuce.