Drain the blueberries. Mix sour cream, quark and 80 g sugar. Set 2 tablespoons of blueberries aside, finely puree the rest. Stir under one half of the cream. Mix both creams together, stir briefly so that streaks appear, chill.
Cream butter, 40 g sugar, salt and vanillin sugar. Stir in the eggs one after the other. Mix flour and baking powder, alternating with the milk. Heat up the waffle iron and grease lightly.
Bake 6 waffles one after the other from the dough. Divide the waffles into 5 hearts each. For each turret on 2 hearts give 1 tablespoon of cream and some blueberries. Place the third heart on top and press down a little.
Sprinkle with pistachios.