To make the filling, put the cream cheese, icing sugar and zest from ... and transfer to a serving plate. Place the lemon curd in a bowl and loosen with just enough of the remaining lemon juice ...
Add the lemon curd and swirl through the cream. To assemble, dip half the biscuits into the limoncello syrup for about 3 seconds and divide between serving plates. Top with half the mascarpone ...