From the cookbook Six Ingredients or Less. A good and easy make-ahead dish to take to large potluck gatherings, and always a hit.
Chill large bowl. Pour pineapple, undrained, into bowl; add dry pudding, mix well. Slice in half the drained mandarin oranges, add to pudding mix. Add nuts and marshmallows; blend. Stir in Cool Whip and blend well; chill 8 hours.
For holiday time, add 2/3 C maraschino cherries.