Combine the lemon juice, sugar, water into a bowl and place over simmering pot of water.
Mix eggs together with the cornflour in a separate bowl.When the sugar starts dissolving, add the cornflour and egg mixture.
Whisk constantly for 8-10 minutes, until the mixture starts to thicken. Add the butter before taking it off the heat.
Let it cool down and refrigerate in a piping bag until ready to use.
Mascarpone & Filling:
2 packets of ladyfingers 24-30
250g mascarpone cheese
300ml double cream
100g icing sugar
300ml warm milk with a table spoon of the lemon curd mixed in.
To make the filling:
Mix together the mascarpone, cream and icing sugar for 1-2 minutes on high speed in your stand mixer with the whisk attachment. Set in the fridge for at least 15 minutes before using.
To assemble the tiramisu, soak the ladyfingers one by one in the warm milk and place a layer into your dish.
Spread about 1/4 of the mascarpone filling, followed by half the lemon curd. Spread some more mascarpone filling on top and repeat with another layer of lemon curd.
Remember to save some of the mascarpone to pipe on top for decorating.
Grate over with some lemon zest and chopped mint and enjoy.