Pour about an inch of water in a small pot, and bring to a gentle simmer.
Chop the chocolate into equal pieces, and place in a heat-safe bowl (and one, that is flat bottomed and wide enough to enclose the rim of the glasses) over the simmering water, so that the bowl does not come in direct contact with the water.
Stir constantly, until about 80% of the chocolate has melted. Remove from the heat, and stir until all the chocolate is melted.
Dip the glasses in the melted chocolate. You can tilt them slightly to create the wavy effect, then turn upside down, and allow the chocolate to drip on the sides slightly.
Place all ingredients (except the solid chocolate) in a blender, and process until smooth.
Pour the cocktail in the prepared glasses and garnish with a fresh strawberry.