Mix flour, baking powder, sugar, vanillin sugar and salt in a mixing bowl. Add milk, oil, egg and quark and knead with the dough hooks of the hand mixer to a smooth dough. Wrap dough in foil and chill
Wash, stone and halve the cherries. Stir jam until smooth and mix with the cherries. Roll out the dough rectangularly (approx. 30 x 40 cm) on a floured work surface. Spread the cherries on the dough. Carefully roll up the dough from the long side. Cut the roll into 12 slices. Place snails with the cut surface facing upwards in a greased springform pan (26 cm Ø) sprinkled with flour. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 20-25 minutes. Remove the cake from the oven and let it cool down on a cake rack
Sieve the icing sugar into a bowl. Add lemon juice and mix to a thin glaze. Spread the icing with a spoon on the warm snails and serve lukewarm or cold
Waiting time approx. 30 minutes