Mix curd, egg, oil and sugar. Mix flour and baking powder. Stir half of the flour into the quark mixture. Knead in the remaining flour. Roll out the dough into a rectangle (36 x 32 cm) on a floured work surface.
Roll out the raw marzipan mixture into a rectangle (32 x 9 cm) on a work surface dusted with icing sugar and place it on the lower part of the dough. Warm the nougat in a hot water bath, spread on the remaining dough and sprinkle with pistachio kernels.
Roll up the dough from the long side from top to bottom. Cut the roll into 16 approx. 2 cm wide strips. Place snails on two baking trays lined with baking paper. Bake in the preheated oven (electric: 175 ° C/ gas: level 2) for 20-30 minutes.
Let it cool down on a cake rack. Dust with icing sugar.