For the compote, wash, halve and stone the plums. Stir 5 tbsp. juice and sauce powder until smooth. Boil up the rest of the juice and sugar. Stir in sauce powder and simmer for 3-4 minutes. Stir in plums and simmer briefly.
Let the compote cool down.
For the poor knights, whisk eggs, milk and 1 pinch of salt. Place half of the slices of bread next to each other in a flat bowl. Pour half of the egg milk over it, turn it and let it soak for about 2 minutes.
Heat lard in portions in a coated pan. Fry the slices of bread for 2-3 minutes on each side until golden brown. Keep warm. Soak the remaining bread in egg milk and fry in the same way. Dust with icing sugar.
Serve with compote. Serve with vanilla sauce.