Knead flour, 50 g sugar, egg, 100 g butter in flakes and salt to a smooth dough. Wrap in foil and chill for about 30 minutes. Roll out the dough on a floured work surface until round (28 cm Ø). Line a greased tart tin (26 cm Ø) dusted with flour. Place the tin in a cool place for about 15 minutes. Place baking paper on the dough, add dried pulses and bake in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 15 minutes.
Carefully remove the baking paper with the pulses. Continue baking for approx. 5 minutes at the same temperature. Let it cool down. Bring 200 g butter in pieces and sweetened condensed milk to the boil in a saucepan. Stir constantly over medium heat for 15-20 minutes until thick and creamy. Fold in hazelnuts, except for a few for decoration, and immediately place on the tart base. Smooth and chill for at least 1 1/2 hours. Coarsely chop the chocolate coatings. Bring the cream to the boil, remove from the heat. Melt the chocolate coatings in the cream while stirring. Carefully spread the chocolate cream on the caramel-nut base and smooth it down. Chill for at least 2 hours.
Coarsely chop the chocolate coatings. Bring the cream to the boil, remove from the heat. Melt the chocolate coatings in the cream while stirring. Carefully spread the chocolate cream on the caramel-nut base and smooth it down. Chill for at least 2 hours. Caramelise 30 g sugar in a pan until golden brown. Turn the rest of the nuts in it, spread on a piece of oiled aluminium foil and let it set. Decorate the tart with caramel nuts
waiting time approx. 4 hours