Whisk the egg whites in a bowl until stiff peaks ... Place a sheet of baking parchment over a cooling rack and turn the cake out onto it. Peel off the baking parchment from the base of the cake ...

Whisk until you have a thick icing and set aside. It should be cool by the time the cake has baked and cooled. For the cake, whisk the flour, bicarbonate of soda, a good pinch of sea salt and the ...