Preheat the oven
to 190'C/375 "F/Gas 5. Grease and line a 33 x
23cm/13 x 9in Swiss roll tin with greaseproof paper
and grease the paper.
To make the base,
sift the flour and baking powder into a mixing bowl.
Add the butter, sugar, egg and milk. Beat until the
mixture becomes smooth, then turn into the prepared
tin and smooth the surface.
Scatter the
drained fruit evenly over the batter mixture.
Mix together the
remaining topping ingredients and spoon evenly over
the fruit. Bake for 40 minutes, or until golden
brown and the centre is firm to the touch.
Leave to cool,
then dust with icing sugar. Serve with whipped
cream, if wished.