Line cake tin with foil and put sponge in - it should either be the tin the sponge was cooked in, or a
very close fit. Slowly dissolve the gelatin in the coffee, then mix the coffee mixture into the condensed milk. Pour over
sponge cake, trying to make sure mixture is absorbed evenly. Refrigerate for several hours until set. Cut into small serves,
decorate with cream and powdered chocolate.