Mix the mascarpone with low-fat quark and elderflower syrup, then add the melted couverture and stir in. Soak the gelatine in cold water. Then squeeze out and add 2 tablespoon elderflower syrup. Dissolve in a water bath and mix into the curd mixture. Let the mixture cool down until just before it starts to stick, then fold in the whipped cream and the egg whites. Fill in portions into bowls and refrigerate for approx. 3-4 hours until eaten.