Work the marzipan, sugar, egg white, lemon peel and bitter almond oil with a dough hook to a smooth part.
Shape small rolls (approx. 7 cm long) with damp hands, roll in almond flakes and shape into croissants.
Place on a baking sheet lined with parchment paper.
Bake in the preheated oven at 175 degrees on the middle rack for 12-15 minutes. Take out and let cool.
Chop the couverture and melt it in a water bath.
Dip the croissant at one end 2-3cm deep in the couverture and let it set.
Dust with powdered sugar if necessary.
Nice to give away: Line a flat box or metal box with a round cake tip so that the cake tip stands up at the edges. Place croissants in them, dust with powdered sugar if necessary and close with the lid!
Very italiano: you can also use pine nuts instead of the flaked almonds.