This cake is for a friend of my cousin, Florence. This friend likes chocolate and strawberry. I thought of a chocolate filled and frosted cake immediately and decorate it with strawberries. But I wanted to do something different instead of all chocolate sponge layers, filling and frosting. Strawberry mousse sandwiched in between the chocolate cake layers came to my mind. The tartness and lightness of strawberry mousse with the chocolate frosting seem like the best combination to me.