This is the most *heavenly* banana dessert! Because of the bananas this is best served the same day it is made. The cream filling can be cooked on top of the stove but to avoid scortching the saucepan I like to cook it in the microwave. Plan ahead the filling needs to chill for 4 hours, prep time includes chilling time. For a less sweeter whipped cream you can reduce or omit the powdered sugar.