1 (16 oz.) can crushed pineapple in heavy syrup
1 c. miniature marshmallows
1 pkg. Royal pistachio pudding
1 (9 oz.) carton Cool Whip

Mix in bowl pineapple, marshmallows, and Cool Whip. Sprinkle dry pudding over and mix well.

Spread in 9 x 9 pan and sprinkle nuts over top. Chill in refrigerator one hour or more.