First prepare the glaze: put the sugar in a bowl and start adding the egg white a little at a time, stirring until you get a sort of smooth but firm batter.
Take the pastry and cut it in half lengthwise (leaving it on its sheet of parchment paper), then cut each of the rectangles thus obtained into strips about 3 cm wide.
Then spread the icing over the whole dough until it is covered evenly.
Spread the jam with a sieve, then place it in a sac-à-poche and with a smooth and thin spout create the diamond-shaped decorations typical of puff pastry.
Gently move the parchment paper on the oven tray, then separate the puff pastries, moving them slightly apart.
Cook for about 15 minutes at 200 ° C in a preheated ventilated oven.
The puff pastries are ready, let them cool well before you taste them!
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