Heat the sugar in a saucepan and caramelize until golden brown, then immediately deglaze with orange juice and heat again. Season with cinnamon and clove powder. As soon as the caramel has melted again, add the orange fillets and simmer on a low heat for about 10 to 15 minutes.
In the meantime, mix the mascarpone with the natural yoghurt and season with amaretto and sugar (if you want, you can replace the amaretto with amaretto sugar, but then reduce the normal sugar - see alternative in the list of ingredients).
Distribute the cream in dessert bowls and decorate with the orange fillets. Consume immediately - and while still hot.