This is a very light and delicate sponge and is traditionally served with fresh fruit and cream – perfect for afternoon tea. This one uses a good quality strawberry jam but you can opt for any filling that has a full, fruity flavour such as lemon curd or apple sauce. For a more tropical flavour, try a passionfruit filling (see note below).
Omit the jam for the filling and the caster sugar for sprinkling. Whip cream with 1 tablespoon of icing sugar until it holds its shape. Fold through 2 tablespoons of fresh passionfruit pulp and use to fill and top sponge sandwich. Coat top with 2 tablespoons of passionfruit pulp.