1. Melt the choc and water together in a double boiler or microwave. 2. Separate the eggs. 3. Add Yokes and Sherry or Brandy to the choc mixture. 4. Whisk egg white until stiff. Carefully Fold the egg whites into the chocolate mixture. 5. Layer the sponge pieces and choc mix in a large bowl. Leave in refridgerator to chill and set. 6. Top with whipped cream or for different flavour use cream made from unsalted butter.