1 (3 oz.) box instant pistachio pudding mix
20 oz. can crushed pineapple (do not drain)
1/2 c. pecans, chopped
8 oz. sour cream
2 c. sm. marshmallows
1 small tub (or 2 cups) Cool Whip

Combine pudding mix and crushed pineapple. Fold in nuts, Cool Whip and sour cream. Add marshmallows. Place in 13 inch pan or dish. Store in the refrigerator.