1 lg. can tuna, drained
1 lg. can mandarin oranges, drained
1 med. onion, chopped (optional)
1/2 to 1 head lettuce, chilled
1 1/2 to 2 c. uncooked shell or elbow macaroni, drained and chilled
Cloe slaw dressing

Combine all but lettuce and refrigerate. At serving time break lettuce into tuna mixture, mix lightly and add more dressing if desired.