For the dough, mix flour, sugar, vanillin sugar, baking powder and 1 pinch of salt. Add butter in pieces and 6 tablespoons of ice-cold water. Knead first with the dough hooks of the hand mixer and then quickly with your hands to a smooth dough.
Wrap in foil and chill for about 1 hour.
For the crumbles, briefly mix flour, sugar, cinnamon and butter in pieces with your hands to form crumbles. Cover and put in a cool place.
Grease a rectangular tart with a removable base (approx. 20 x 28 cm; or see tip on page 109) and dust with flour. Roll out the dough between two layers of baking paper to a rectangle (approx. 24 x 32 cm).
Place in the mould and press down at the edge. Prick the bottom with a fork.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3). Wash apples and cut out the core. Cut apples into thin slices. Distribute in the mould. Heat the jelly and spread on the apples.
Spread crumble on top. Bake in a hot oven on the lowest shelf for about 40 minutes.