Take the puff pastry out of the refrigerator about 10 minutes before processing.
Pour the pears into a sieve and drain well. Roast the almonds in a pan without fat for about 5 minutes while turning.
Cut 6 pear halves fan-like thinly. Use the remaining pears for other purposes. Roll out the puff pastry. Cut out 6 circles with a circle cutter (approx. 9.5 cm Ø). Place the circles on a baking tray lined with baking paper. Scratch the edges all around about 1 cm but do not cut through.
Place one pear fan in the middle of each circle, sprinkle 1/2 teaspoon sugar on each and bake in a preheated oven (electric cooker: 225 °C/ circulating air: 200 °C/ gas: see manufacturer) for 10-12 minutes.
In the meantime, slowly warm up the jam in a small pot at low heat. Take the Tartelettes out of the oven. Allow to cool briefly, brush with liquid jam and sprinkle with flaked almonds.