Chocolate mousse in its purest form

Just a very quick note to say you need to make this recipe asap. It is the most intense chocolatey chocolate mousse I have ever tasted (not surprising given that it contains nothing but chocolate and water) and it was so quick to throw together (I whipped this up while waiting for my pasta to cook). Me and my flatmate shared this drizzled with some fruity olive oil and a good-sized sprinkle of fleur de sel and although the mousse is very rich, the fruity olive oil and the fleur de sel cut right through the richness (which again makes me think that a chocolate olive oil fleur de sel ganache truffle would be outstanding – need to research recipes!). So yeah, make this asap!