Drain the sour cherries and place in a suitable glass bowl. Whisk the cream cheese with the sugar, vanilla sugar and egg yolk. Whip the cream with the cream stiffener until stiff and then stir into the cream. Now pour the cream over the cherries.
Brown the sugar with the almond slivers in the pan over medium heat and sprinkle on the cream. The cream can be served after at least two hours in the refrigerator.