Drain and chop the cherries. Cut the biscuits into small pieces. Chop both chocolate coatings and melt them with coconut oil in a hot water bath. Mix eggs, icing sugar and cocoa with the whisk of the mixer until creamy.
Stir in the couverture mixture in a thin stream. Fold in the cherries and biscuits. Chill for about 1 hour until the mixture is firm but still malleable.
Quarter the mass. Form each quarter into a salami roll of approx. 20 cm length (approx. 5 cm Ø), wrap in foil. Chill for at least 5 hours, preferably overnight.
Wrap the chocolates out of the foil, dust all around with icing sugar and rub the sugar a little. Wrap with kitchen yarn as desired. Keep covered in the fridge.