Mix flour and baking powder. Press a depression in the middle. Add egg, sugar, vanilla sugar, salt and lemon peel. Add cold fat in flakes. Knead everything quickly to a dough.
Wrap the dough in foil and refrigerate for about 30 minutes. Drain the sour cherries on a sieve. Drain the quark well as well. Wash lemon hot, rub dry, grate peel and squeeze out the juice.
Separate eggs. Mix egg yolk, quark, salt, milk and half of the sugar. Fold in pudding powder, lemon peel and lemon juice. Beat the egg white with the remaining sugar until very stiff and fold into the quark mixture.
Grease a springform pan (26 cm Ø). Roll out the dough to a circle (32 cm Ø) and place it in the form. Press the rim and prick the base several times with a fork. Spread cherries on it and spread the quark mixture on top.
Bake in the preheated oven (electric oven: 175 °C/ gas: level 2) for about 1 1/2 hours until golden brown. Remove the cake, let it cool down on a cake rack and dust with 20 g icing sugar. Knead the raw marzipan mass with icing sugar.
Roll out part of the marzipan on foil. Cut out the rabbits. Sprinkle thickly with cocoa. Knead the remaining marzipan with a few drops of green food colouring and press it through a garlic press. Place on the cake.
Decorate with the rabbits and sugar eggs, spread sugar flowers on the edge of the cake. Makes about 12 pieces.