Of course, if you have a lot of plums in the season of its ripening, you can cook the jam for future use by increasing the ingredients. I was preparing tea for two.

Plums put into a saucepan, pour water and add a tablespoon of the total amount of sugar. Put on the heat and cook for 15 minutes until fully soft plums. Plum I thawed the evening, but you can use frozen, just need to cook a little longer.

Plum puree them in a blender, add cinnamon and sugar, cook on medium heat without lid for about 15 minutes, then put the chopped chocolate. On low heat stir to dissolve the chocolate.

That's all. Jam spread in the vessel and cooled.