Prepare the shortcrust pastry and line the prepared springform pan with it so that an approx. 3.5 cm high edge is created. Chill for at least 30 minutes.
Meanwhile, for the filling, bring the sugar with the butter to the boil while stirring until the sugar is caramelized. Then stir in the syrup and let it cool down for about 5 minutes.
Meanwhile preheat the oven to 180 ° C top / bottom heat.
Beat the eggs until frothy and pour in the caramel mixture.
Then add the quark, sour cream and the flour and stir in well.