For the lemon tiramisu, first prepare the cream. To do this, mix the Qimiq and yogurt well and add the icing sugar, vanilla sugar and the juice of 1 1/2 lemons.
Drizzle the biscuits with the juice of the last 1/2 lemon. Arrange in the mold, spread with a layer of cream, put again biscotti and finish with another layer of cream. Leave the lemon tiramisu in the refrigerator for at least 6 hours.