Knead the flour, 60 g sugar, 1 pinch of salt, egg and butter in pieces first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Cover and chill for about 30 minutes.
Wash and stone the cherries. Boil 75 g brown sugar, 1/2 teaspoon cinnamon and nectar in a pan. Add the cherries and simmer covered for about 5 minutes. Drain well. Grease a rectangular tart tin (20 x 28 cm).
Roll out the short pastry rectangularly (approx. 24 x 32 cm) on a floured work surface. Line a tart mould with the pastry, press on, cut off any protruding edges. Sprinkle the base with nuts. Spread cherries on top.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) on the lower rack for 20-25 minutes. Beat the egg whites until stiff, add 1 pinch of salt and 125 g sugar.
Put the mixture into a piping bag with a large star-shaped spout and squirt it spirally onto the tart. Mix 1 pinch of cinnamon and 1 tablespoon of brown sugar, sprinkle on the tarte. Bake the tarte for another 8-10 minutes at the same temperature.
Let it cool down on a cake rack.