Preheat the oven for 180°C. Core the apples so that the enough filling can go in the middle and place them in a casserole dish. Cut the marzipan into 1cm strings and put in the middle of the apple. Mix the sugar with cinnamon, the nuts and raisins and add to the middle of the apple so that the apples are completely filled up.
Bake the apples in the oven for about 45 minutes until they are soft and start to break open. Serve with custard.