German Cheesecake (Mit Quark) - cooking recipe

Ingredients

pastry
1 cup flour
1 teaspoon baking powder
1/3 cup sugar
1 egg yolk
1 tablespoon milk
1/4 cup butter
filling
2 lbs Quark (German cream cheese, similar to ricotta)
1 tablespoon cornstarch
2 tablespoons custard powder (heaping Tbsps, Bird's custard)
2 egg yolks
3/4 cup sugar, divided
1 drop lemon flavoring
1 1/2 cups milk
3 egg whites
2 cups raisins or 2 cups cherries, well-drained

Preparation

Preheat oven to 350F.
Mix pastry ingredients together. Press 2/3 of the pastry onto the bottom of a springform cake pan. Press the remaining 1/3 in a 3 cm high ring up the sides of the pan.
Drain the quark and mix it with 1/2 cup of the sugar, the custard powder, egg yolks, corstarch, and flavouring. Add milk, and the raisins or cherries.
Beat the egg whites with the remaining 1/4 cup sugar til stiff. Fold gently into the rest of the filling. Pour into the springform pan.
Bake for 60 minutes.