Set aside to cool and keep the oven on. Grease and line a 23cm/9in cake tin with baking paper (see recipe tip). In a large bowl, beat together the butter and sugar until pale and fluffy.
Arrange two or three glazed pieces of strawberry on top and sit the top half of the sponge on top. Dust with icing sugar to serve. Prepare ahead: The cake on its own, without the filling ...