Wash, halve and stone the plums. Mix with 1 tbsp. sugar and 2 tbsp. plum brandy, let stand for a while. Separate eggs. Beat the egg yolks, salt, vanilla pulp and 50 g sugar with the whisk of the hand mixer until creamy.
Stir in cream, vanilla sugar, 1 tablespoon of plum brandy and flour. Beat the egg whites until stiff, then add 50 g sugar. Fold the beaten egg whites into the dough in two portions. Spread plums on the bottom of a greased ovenproof dish and pour the mixture on top.
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 35-45 minutes. Cover the surface with aluminium foil if necessary. Remove Clafoutis from the oven, dust with icing sugar and serve.