Melt the butter in a saucepan. Mix flour, salt, sugar and
cheese in a bowl. Add butter, egg and milk.
Mix well. Peel, core and dice apple. Add to the mixture.
Pour into a greased loose-bottomed 20 cm (8 inch) cake tin and level the
Bake at 190 °C / 375 °F / Gas 5 for 30-35 minutes
or until risen and golden.
Cool for 5 minutes then remove from tin and place on
a wire rack. Serve warm with custard if desired.