Aunt Joyce's Pistachio Salad

1 box instant pistachio pudding

1 (20 ounce) can crushed pineapple

1 small container Cool Whip

1 cup mini marshmallows

Nuts and maraschino cherries (optional)

Mix dry pudding with Cool Whip.  Fold in crushed pineapple and marshmallows.  Add nuts and cherries if desired.