Knead flour, 175 g butter, 3 tablespoons water and salt to a smooth dough. Wrap dough in cling film and chill for about 30 minutes. Roll out dough on baking paper round (approx. 30 cm Ø) and put it into the greased tart tin (26 cm Ø), remove baking paper. Press the dough on the edge. Fold the protruding dough inwards and press down. Prick the base several times with a fork. Whip 100 g soft butter, sugar and vanilla sugar with the whisk of the hand mixer for about 5 minutes until creamy.
Stir in the eggs one after the other. Fold in the beet syrup. Add 175 g nuts to the mixture and fill into the mould. Scatter the remaining nuts on the tart. Bake the tart in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) on the lower rack for approx. 45 minutes. (If the filling gets too dark, please slide a baking tray over the tart). Take out the cake and let it cool down on a cake rack
waiting time 30 minutes