Clean and wash the rhubarb, weigh 800 g of it and cut into approx. 3 cm long diagonal pieces. Fill into a bowl, mix with 2 tbsp. sugar and let it stand for about 10 minutes.
Grease a fat pan (approx. 32 x 39 cm; at least 3.5 cm deep) and dust with flour. Separate 5 eggs. Cream fat, 350 g sugar, vanilla sugar and 1 pinch of salt. Stir in 5 egg yolks and 5 eggs one after the other and then stir in vanilla sauce.
Mix flour and baking powder and stir in portions briefly. Spread on the fat pan. Spread the rhubarb on top. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer) for approx. 30 minutes.
Beat 5 egg whites and 1 pinch of salt until stiff. While continuing to beat, pour in 300 g sugar and beat until the sugar is completely dissolved. Remove the cake from the oven. Turn up the oven temperature: Electric cooker: 200 °C/circulating air: 175 °C/gas: see.
Manufacturer. Spread the meringue loosely on the cake and continue baking for about 15 minutes. Let the cake cool down.