Meanwhile, stir together the lemon juice and icing sugar. When the cake has cooled a little, poke holes in the top using a skewer, chopstick or a piece of raw spaghetti. Drizzle over the icing ...

For the lemon icing, sift the icing sugar into a bowl and stir in the lemon juice until smooth. Drizzle over the cooled cake. To finish, finely chop the remaining pistachios and scatter over the ...