Wash the apricots, halve, stone and cut into slices. Grease a fat pan (deep baking tray; approx. 32 x 39 cm) and dust with flour. Preheat the oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see
manufacturer). Melt 500 g butter. Mix 750 g flour, sugar, vanilla sugar, cinnamon and 1 pinch of salt. Add the butter while still hot. Knead coarsely with the dough hooks of the mixer to crumbles.
Scarcely 2⁄3 Spread the crumbled dough on the tray and press it down to a base. Sprinkle 1 tablespoon of flour over the remaining dough. Swivel the bowl slightly so that the crumbles do not stick together. Spread the lemon curd on the dough base.
Add the apricots. Add the rest of the crumble. Bake in the hot oven for about 45 minutes.