Knead 100 g flour, 50 g sugar, vanillin sugar, salt, fat in pieces, egg yolk and 1-2 teaspoons ice-cold water first with the dough hooks of the hand mixer and then quickly with your hands until smooth. Cover and chill for about 45 minutes.
Bring crème fraîche, honey, 40 g sugar and 30 g flour to the boil while stirring. Stir in the hazelnut flakes. Let cool down for 10-15 minutes
Grease a tart or springform pan (26 cm Ø). Roll out the shortcrust pastry on a little flour until round (approx. 28 cm Ø). Put it into the tart tin and press on the edge. Spread the nut mixture on the base and pull up 2-3 cm at the edge
Bake in the preheated oven on the lowest shelf (electric oven: 175 °C / fan oven: 150 °C / gas: level 2) for approx. 30 minutes. If necessary, cover the edge with aluminium foil after approx. 15 minutes. Allow to cool down
Chop the couverture and melt in a hot water bath. Spread on the tart base and let it dry
Wash, clean, pat dry and halve or cut into thick slices. Spread on the ground. Mix casting powder and 2 teaspoons of sugar. Mix with 1/4 l water and bring to the boil while stirring. Spread over the strawberries and let it get firm. Whipped cream tastes good with it