This one is my favorite (it's from the Biggest Loser Cookbook):
1 Monstrous Banana, quartered
Spread some peanut butter on each quartered piece (1-2 tablespoons)
Glob some Weight Watchers Boston Cream Yogurt in the middle
Sprinkle some grapenuts on top
It's pretty tasty! I like it, too, with just peanut butter and honey on the banana. It's a really good treat.