For the cones:
Mix flour, quark, salt and butter, knead to form dough and let it rest for 1 hour.
Preheat the oven to 200°C. Mix the finely ground cumin with the diced prosciutto. Roll out the dough and cut into long triangles. Top with the diced prosciutto and roll into cones. Brush them with egg yolk and bake them in the oven for around 15 minutes until golden.