Most years on Father’s Day I dig out my recipe for the richest, gooiest chocolate cake I can find to treat the old man. (A nice thoughtful gift I thought, until I heard about the girl who bought her Dad a DVD, a watch, AND made him breakfast in bed. What? Dad, don’t get any ideas…) This weekend with the diet niggling at the back of my mind I thought I’d have a go at this recipe from Cook Yourself Thin which has always intrigued me: beetroot chocolate fudge cake.