Melt the chocolate in a double boiler until runny.
Pour a thin layer into two muffin cups, make sure to get into up the sides of the cups as well. Place in the freezer for 15-20 minutes or until the chocolate is still. (A tip is to chill the muffin cups beforehand, so the chocolate sets fast)
Whip the cream until soft peaks and gradually add the sugar and vanilla extract.
Gently slide the chocolate cups out of the muffin cups, fill them with chocolate mousse, and top with Chantilly cream, berries, and a pinch of cinnamon.
You can save a bit of chocolate and make shavings with a vegetable peeler to use as a topping for your dessert.