Knead a dough from flour, margarine, quark and salt. Place in a greased springform pan and pull up one edge.
Spread the washed and drained blueberries on the floor. For the topping, stir the eggs with the sugar until frothy. Then stir in the remaining ingredients and pour the sauce evenly over the blueberries.
Bake the cake at 175 degrees top and bottom heat or 165 degrees convection for about 45 minutes.
Especially tasty when served lukewarm with a dollop of cream.