Pistachio Jello Salad

• 2 3 oz pkg Jello instant pistachio pudding
• 1 regular size can of undrained crushed pineapple (about 2 1/2 cups)
• 2 c miniature marshmallows (pastel colored)
• 1 c walnuts (optional)
• 2 9 oz tubs of Cool Whip

Stir the dry pudding mix and crushed pineapple (with juices) together.
Add Cool Whip, marshmallows, and nuts. Serve immediately or refrigerate.