Wash, halve, stone and slice the plums (drain the plums from the jar and collect the juice)
Boil 1/2 l currant juice (or plum juice and 1/4 l currant juice) and sugar. Stir starch with a little water until smooth. Pour into the juice while stirring and bring to the boil. Fold in plums. Let the groats cool down
Fry the muesli briefly in a pan without fat if necessary. Stir yoghurt, vanillin sugar and a little cinnamon until smooth. Serve the porridge with the yoghurt. Sprinkle with muesli and decorate with mint