Soak the gelatine leaf in cold water in a plastic bowl (the water needs to totally cover the gelatine).
Bring the cream to boil with the milk and the sugar (if you use corn starch, add before boiling).
Lift and squeeze the gelatine gently from the water and add it in the milk mixture (only if no corn starch is used).
Add the hot milk/cream/sugar mixture gradually to the chocolate coins stirring continuously until the chocolate is completely melted.
Let cool to 30˚C, then pour them in cups (you can use any cups from our Martellato range).
When cooled to room temperature, cover the cups with the relative Martellato lid and put them in the fridge.