Method: 1. Melt the chocolate and spread on a lined swiss roll tin. 2. Leave it to cool. 3. Beat margarine and sugar until creamy, add the beaten egg. 4. Mix in the oatmeal, walnuts, cherries and sultanas. 5. Spread evenly over the chocolate and bake in a pre-heated oven at 150°C/300°F/Gas 2 for 20 to 30 minutes until golden brown.