Grease a 22cm tin and line with silicon.
- Pour over one breakfast cup of boiling water over the chopped dates. Add on tsp of bicarbonate of soda and leave to stand.
- Cream sugar, butter, egg, flour, baking powder and vanilla essence. Add mixture to the chopped dates.
- Bake in a moderate oven 180 for 30-35 minutes. Until a skewer comes out clean. Leave to cool.
- Meanwhile, mix together all topping ingredients except walnuts and boil for 3 minutes – until the mixture starts to thicken and go pale – it should coat the spoon. Pour over the cooked cake and decorate with halved walnuts.