Finely grate the marzipan. Add saffron and knead well with your hands. Shape the marzipan into a loaf. Cut the surface several times at an angle to form a loaf of bread. Coarsely chop the couverture and melt it in a hot water bath.
Cover marzipan bread with chocolate coating and leave to dry for 2 hours. Cut marzipan bread into 12 slices and serve.