All you need is a small box of pistachio pudding, a 20 oz. can of crushed pineapple, 2 C. mini marshmallows, and an 8oz. tub of Cool Whip. Stir the first three ingredients together and then fold in the Cool Whip. Best to refrigerate overnight if you can so the marshmallows can soften.
Doesn't look very green in my picture, but it is a green salad which will be ready for St. Patrick's Day tomorrow!