Place the puff pastry slices next to each other and allow to thaw. In the meantime, measure 3 tablespoons of milk, stir with the pudding powder and sugar until smooth. Bring 470 ml milk to the boil. Stir in the pudding powder, bring to the boil and simmer for 1 minute.
In the meantime cut the peach halves into slices. Moisten the puff pastry slices slightly with water, place them on top of each other and roll out into a large square (40 x 40 cm) on a floured work surface.
Cut out 16 squares (10 x 10 cm). For 8 squares fold the corners to the middle. For other squares, cut the corners about 4 cm deep and fold half of each corner to the middle.
Place 1 tablespoon of each pudding in the middle and cover with peach slices. Whisk the egg yolks and 2 tablespoons of milk. Spread the windmill blades or edges with it and sprinkle with sugar crystals. Put the puff pastry particles on 2 baking trays lined with baking paper.
Bake the trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes. In the meantime heat up the jam and pass it through a sieve. Remove the particles from the oven and brush the peaches with jam.
Let it cool down.