In a large bowl, cream the butter and sugar until it's light and fluffy. Add the egg and mix until combined.
To the mixture, add the cherries, currants and ground almonds and mix until combined. Spoon the mixture onto the jam-covered pastry bake and spread around to an even finish, from edge-to-edge.
Bake for 30 minutes in your pre-heated oven. Once baked, sprinkle the Paradise Slice with some sugar and allow to cool in the tin. Once cool, remove and cut into your desired size.