Preheat the oven to 220C/425F/Gas 7 (200C fan). Sprinkle the sugar over the base of the cake tin in an even layer. Arrange the plums on top of the sugar, cut-side down. Roll out the marzipan ...

Tip the mixture into the lined cake tin, drop in the plums and bake for 30-35 minutes. Now for the topping; halve and de-stone the plums and add to the same pan as you cooked the syrup and honey.