Wash, drain and clean the gooseberries. Mix jam and 1-2 tbsp. sugar, add gooseberries.
Grease a tart mould with a removable base (approx. 24 cm Ø). Cream 100 g butter, 75 g sugar, vanillin sugar and 1 pinch of salt. Knead in sour cream, 300 g flour and baking powder. Roll out the dough on a little flour until round (approx. 28 cm Ø).
Place in the mould and press on the edge.
Preheat oven (electric cooker: 200°C/circulating air: 175°C/gas: level 3). Crush or finely chop Cantuccini in the universal chopper. Sprinkle on the dough base. Spread the gooseberries on top.
Bake in a hot oven on the lowest shelf for 40-45 minutes. Let it cool down. Whipped cream is delicious with it.