Set aside 4 tablespoons of the strawberry purée - whip the whipped cream until firm.
Mix in the strawberry puree and cream cheese, add the sweetener and whipped cream to taste. Peel and slice the bananas.
Divide the strawberry / cream cheese cream into dessert bowls, place the banana slices on top, pour 1 tablespoon of strawberry purée over them, add a large dollop of whipped cream and pour chocolate liqueur or sauce over them.