Caramelize sugar in a saucepan, deglaze with wine and add cinnamon. Let it boil down a little, add the plums. After the plums have pulled through a little, put the compote in the fridge.
Soak the gelatine in cold water. Beat the sugar, egg yolks and amaretto on a warm water bath with a whisk until creamy. Then add the gelatine to the warm mixture and stir in the mascarpone / quark. To cool down, stir cold in a bowl with ice water. As soon as the mass has set, the cream can be folded in. Then put the mixture in the refrigerator for at least two hours.
Serving:
Then fill the cooled amaretto mousse into glasses with a piping bag. Then put on the amarettinis, if you like, you can sprinkle them with a little amaretto, and finally pour the plums over them.