Clean, wash and cut the rhubarb into pieces and sprinkle with 125 g sugar. Leave to stand for about 1 hour. In the meantime, mix flour, 250 g sugar and cinnamon in a mixing bowl. Add egg yolk and fat and work into crumbles with the dough hook of the hand mixer. Put approx. 4/5 of the crumbles on a greased, flour-dusted fat pan (30x40 cm) and press to a smooth dough.
Bring the rhubarb to the boil in a saucepan. Mix starch with 75 ml water until smooth and stir into the boiling rhubarb, bring to the boil again briefly. Let the compote cool down. Cream remaining sugar, vanillin sugar and eggs. Stir in pudding powder and sauce powder. Fold in curd and lemon juice. Put the cooled rhubarb on the dough and smooth it down. Spread the quark mixture on the rhubarb and smooth it down as well. Bake the cake in a preheated oven (electric: 200 °C/ gas: level 3) for approx. 45 minutes. After 15 minutes of baking time pour the remaining crumbles onto the quark mixture.
Put the cooled rhubarb on the dough and smooth it down. Spread the quark mixture on the rhubarb and smooth it down as well. Bake the cake in a preheated oven (electric: 200 °C/ gas: level 3) for approx. 45 minutes. After 15 minutes of baking time pour the remaining crumbles onto the quark mixture. Let the cake cool down well and cut into pieces. Results in about 25 pieces. Whipped cream tastes good with it
Tableware: Boltze c/o velvet and special