Wen-jing studies in the southern German city of Stuttgart. When her mother visits from China, it’s an opportunity to sample the delights of southern German cuisine: "Maultaschen” with potato salad, beef roulade and bread dumplings... it’s nothing like the food they get in China. But the pair come from a country with a proud culinary tradition. They don’t just want to try new dishes, they want to learn how to make them. The highlight: learning to bake Black Forest Cake. A report by Almut Maria Röhrl.