Mix all ingredients and heat on a low level, constantly beating with the whisk. Fill into suitable bowls, allow to cool, and decorate with cream if necessary.
The foam cream works also with juices, e.g., freshly squeezed orange juice. For a lower-calorie version, simply leave out the sugar and add liquid sweetener to taste after preparation.
For a cake filling I worked the wine foam cream - cold of course - under a butter cream, the butter cream then gets a distinctive wine taste.