Melt the chocolate shavings or chips on low heat in a bain marie (double boiler) with a pinch of Sarawak or pink pepper. Tape a very large piece of wax paper to your counter. Pour the melted chocolate on top and spread it into a very thin layer with a silicone spatula. Allow to cool.Wash the strawberries and cut them into small pieces. Whip the cream with the sugar until it forms stiff peaks, and incorporate the strawberries.Heat the blade of a knife over the stove, and use it to cut the chocolate into 16 rectangles.In a baking tray, arrange 4 individual desserts by alternating chocolate rectangles with layers of strawberry cream (for each dessert, 4 rectangles and layers). Cover with plastic wrap and allow to rest in the freezer for at least 1 hour. Decorate with more strawberry, mint and the powdered sugar before serving.