Preheat the oven to 200C/400F/Gas 6.
In a food processor blend together the butter and sugar until pale.
Add the eggs and lemon zest and blend to combine.
Add the self-raising flour and ground almonds. Pulse with the blender until just combined.
Mix the apples and the sponge mix and place into a greased, small, deep, oven-proof frying pan. Place in the the oven for 15 minutes, or until risen and golden brown.
Serve dusted with icing sugar and drizzled with cream.