Tender Quark Cake with Raspberry Sauce

Name: Tender Quark Cake with Raspberry Sauce
Prep time: 1 h
Cook time: 1 h
Total time: 2 h
Yield: 1
Ingredients: 100 g caster sugar; 150 g plain flour; baking powder, as needed; 1 egg; 100 g butter; 160 g butter; 425 ml milk; 500 g soft quark; 2 eggs; 1 packet vanilla pudding powder; 1 tbsp rum; 175 g caster sugar; 250 g raspberries; 65 g caster sugar; lemon zest, as needed