Separate eggs. Beat the egg whites and 2 tablespoons of cold water with the whisk of the hand mixer until stiff, adding sugar, vanillin sugar and salt. Stir in the egg yolks. Mix flour, starch and baking powder, sieve portions onto the egg mixture and fold in. Grease 10 coated tartlet cups (8/9 cm Ø) and sprinkle with flour. Pour in the sponge mixture evenly, smooth it down. Place on a grid. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 13-18 minutes. Remove from the oven and let cool slightly on a grid. Carefully turn out of the moulds and let cool down. Wash the grapes, pluck them and let them drain on kitchen paper. Mix curd and wine, stir in sauce powder. Spread the cream on the tartlets and smooth it down. Halve about half of the grapes. Spread all the grapes on the cream and serve or chill
On 12 pieces:
1 hour waiting time