It's made of a soft, golden almond cake that's is marshmallow - y in texture, filled with caramelized banana, chocolate ganache and whipped cream on top for decoration. (lilcookie.com)
I put a layer of raspberry preserves in between the layers, and a vanilla buttercream around the outside with fresh raspberries on top for decoration. (epicurious.com)
To make the ganache on top for decoration simply melt the chocolate with same amount of cream and using a spoon or simply a piping bag fitted with a small tip and drizzle the chocolate over the roll as you like. (homecookingadventure.com)