Place the plums, sugar, water and cinnamon into the prepared dish, mix.
Pour the milk, cream, vanilla sugar and salt into a pan and bring to the boil, transfer to the prepared dish along with the rice.
Approx. 25 mins. (next to each other) in the centre of an oven preheated to 180°C. Sprinkle the cane sugar over the rice, stir briefly, bake for a further 25 mins. Remove both dishes from the oven, leave to stand for approx. 5 mins., serve together while still warm.