Heat the oven to 180°C top/bottom heat.
Grease a 24cm springform pan.
For the shortcrust pastry, knead the flour, margarine, sugar, and oat drink in a bowl, first with a fork and then with your hands to form a smooth dough.
Press the dough into the springform pan, forming a rim 6-7cm high.
Prick the base of the shortcrust pastry several times with a fork.
For the filling, first mix the margarine with cornstarch, sugar, and 3-4 tablespoons of quark until smooth.
Then stir in the remaining quark and cream cheese, almonds, baking powder, lemon zest, and spices.
Smooth out the cheese filling in the shortcrust pastry and bake for about 75 minutes.
Leave it to cool in the oven after switching it off.