Mix the mascarpone with half of the sugar quantity until well incorporated.
Add the whipping cream until it becomes fluffy. Don't over mix because you may spoil it.
In another bowl, beat the yolks with the remaining quantity of sugar and vanilla extract until they get white and double their volume.
Add the yolk mixture to the mascarpone bowl and incorporate with a spatula. Don't use the mixer.
Drain the tropical fruits and reserve the juice.
To assemble the tiramisu, break the champagne biscuits in halves.
Soak in the fruit juice and place the pieces on the bottom of a nice glass. Place 2 biscuits, one on top of the other.
Add 2 tablespoons of cream, 2 tablespoons of fruits and then again 2 tablespoons of cream.
Refrigerate for at least one hour before serving.