For the base, mix fat, 200 grams of sugar and salt until creamy. Stir in eggs bit by bit. Mix flour and baking powder and stir into the fat egg mass. Spread the dough on a fat pan lined with baking paper.
Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 25 minutes and allow to cool. In the meantime, strip currants from the stems, except for a few stems for decoration, wash and drain.
Wash lemon thoroughly, rub dry and grate peel. Then squeeze. Soak gelatine in cold water. Whip cream until stiff. Mix yoghurt, crème fraîche, remaining sugar, vanillin sugar, lemon juice and peel.
Dissolve the gelatine and stir into the yoghurt mass. Fold in cream and berries. Allow to set a little. Spread the yoghurt cream on the base and smooth it down. Put in a cool place for at least an hour.
Decorate with the remaining panicles. Makes 20 pieces.