Pour the heavy whipping cream, 2 teaspoons vanilla sugar (or white granulated sugar with a dash of vanilla extract) into a large mixing bowl. Use hand mixer or KitchenAid stand mixer and whisk on high for 3–5 minutes, until it creates soft peaks.
Fold in quark and additional 2 tablespoons of sugar until combined, smooth and creamy.
At this point you can decide whether to mix the berries into the quark & whipped cream mixture or to layer them like pictured.
If you layer the parfait cups, start with some fruit on the bottom, add quark, repeat until you reach the top of the cup, making sure to end using quark. Set cups aside.
To prepare oats- Over medium high heat add rolled oats and sugar to a small saute pan.
Heat until oats and sugar start to brown. Stir constantly as not to burn the sugar or oats. Once the oats have browned and the sugar has completely dissolved visibly, the oats are done. Remove from heat and sprinkle over quark.
Serve immediately or refrigerate until ready to eat. Enjoy!