Finely dice the marzipan and stir with the egg white until smooth. If necessary, pass through a sieve. Stir in grated coconut, icing sugar, lemon juice and zest. Place approx. 20 heaps on a baking tray covered with baking paper and bake in a preheated oven (electric range: 175 °C/ gas: level 2) for 12-15 minutes.
Carefully remove macaroons from the baking tray and let them cool on a cake rack. In the meantime, roughly chop the dark chocolate coating and melt it on a warm water bath. Dip the macaroons halfway into the couverture and let them dry.
In the meantime, roughly chop the white chocolate coating and melt it in a warm water bath. Pour the couverture into a small freezer bag, cut off a small corner and spray spirals onto the macaroons.
Results in about 20 pieces.