Drain the cherries and let them drain well. Stir cream cheese, quark, egg yolk, 200 g cream and 100 g sugar until smooth. Whip 200 g cream with vanilla sugar until stiff, and finally pour in cream stiffener.
Fold the whipped cream into the quark cream.
Put half of the cream in a large glass bowl (approx. 2 l). Spread cherries on top. Spread the rest of the cream evenly on top, cover and chill until serving.
Melt the butter in a small pan. Stir in 2 tablespoons of sugar. Add flaked almonds and roast until golden brown. Remove from the pan and let it cool down. Just before serving, sprinkle the cream with the almonds.