Warning: This post has a high calorie and fat content. People trying to achieve a bit of pre-Christmas weight-loss should probably not venture any further. Or perhaps they should, because this cake is awesome. Whipped cream, whipped ganache, raspberries, blueberries, all sitting atop a deliciously light sponge cake - this cake has it all (had it all... it's gone now!). Best of all, every part of this cake is as simple as you could ever want. There's no complex steps involving precise measurin...