Soak rice overnight in plenty of water. It can soak for up to 24 hours. Drain.
Place drained rice, sugar, vanilla, salt, boiling water, coconut milk and brew choc into the Thermomix bowl and cook 75 min/100°C/Reverse/speed 1/MC off. Check the consistency of the rice by tasting a grain or two. I ended up adding an extra 30 minutes to this cooking time to get the texture right. You want the rice to be soft and just a little chewy. This will depend largely on how long you have had the rice in the cupboard.
Divide the rice between serving jars. Allow to cool for at least 20 minutes. It really keeps the heat.
Top with plenty of yoghurt, drizzle with liqueur if using, a dollop of jam and the garnishes. You could add chocolate shards to this as well! (Black Forest cake after all!!)