This is another entry from Le Goût Authentique Retrouvé written by a Japanese patissier Hidemi Sugino. I've made a banana mousse cake called B-Caraïbe before - although I'm not that mad about bananas, for some reason I decided to make another one (it looked pretty in the book obviously). He named this cake Exotique - mango mousse and biscuit joconde encased in banana mouse, and coated with lightly roasted coconut. (you set the mango mousse with the sponge first, and push into the banana mousse - that's how you get the one inside the other uniformly)
In the book, the banana mousse looks almost white and really pretty with the roasted coconut, but my mousse turned brown (although I added lemon juice straight after I made the puree, it didn't do the trick) and so it didn't look very appetising - so I cut them in half for the pictures. I wasn't sure about the chocolate sponge for the base, but it actually works really well with the fruit and helps bring the whole flavour together. I was a little worried that the banana flavour might overpower the mango and other ingredients, but it was the right volume and I was quite happy with this banana experience
http://www.nordljus.co.uk/en/index.php?showimage=80