Place the puff pastry slices next to each other and defrost. Peel, quarter and core the pears and cut them into bite-sized pieces. Simmer covered with lemon and apple juice, sugar and cinnamon for 6-8 minutes.
Cut out a circle from each slice of dough. Place an oven-proof cup on top and cut out a circle 1 cm larger all around. Cut a small hole in the middle of each circle.
Cut out dough remains as small circles (see tip).
Stir pudding powder and 4 tablespoons of water until smooth. Stir into the boiling juice and simmer for 1 minute. Pour the pear compote into 4 ovenproof cups (each containing approx. 1/4 l).
Whisk the egg yolks. Brush the edges of the cup with it. Close the cup with the large dough circles. Brush with the remaining egg yolk and decorate with the small circles. Bake in the preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: level 3) for 8-10 minutes.
Serve the pear strudel warm with 1 scoop of vanilla ice cream.