3 cups Greek yogurt (nonfat in weight watchers version)
1 - 3 Oz package orange jello (sugar free in WW version)
8 Oz whipped topping (nonfat in WW) I used cool whip
16 Oz mandarin oranges, drained
20 Oz crushed pineapple, drained
2 cups mini marshmallows 

use mixer with whisk attachment. Beat yogurt about ten minutes, til light and fluffy. Add dry jello mix and beat til incorporated. Stir in cool whip. (I did that by hand) Add oranges and pineapple and stir, then add marshmallows and stir. Refrigerate at least one hour before serving. Serves 10.