Cheesecake: 900 g quark cheese 220 g sugar 5 eggs 4 tbsp flour juice of half lemon 400 g berries (bilberries) blend the berries until quote smooth mix cheese with sugar, then add eggs one at time (for the best airiness) add flour and lemon, and at the end berries and mix line the sides of the pan with cling film or aluminum foil pour over the pre-baked base bake for 50min-1h in 180C, with two small ramekins filled with water in the oven.