Chocolate Beetroot Cake with Hazelnuts

Beetroot (or as we would say in the U.S., "beets") and I go way back.  As a child, I could not (or, more accurately, would not) tolerate beets - whether pickled or just plain roasted.  It's probably an understatement to say I didn't like beets.  I could tell you a story about one particular unfortunate encounter with beets, but then you wouldn't want to keep reading, would you? 

As an adult, when I started traveling to Ireland, over time I became more exposed to beetroot.  Mostly the pickled variety, but occasionally roasted as well.  One dish I really liked, the recipe I am still searching for, was a beetroot and carrot jelly (jello, is U.S. terms).  The beets and carrots were grated and added to a gelatin with, I believe, some orange juice or other orange flavoring.  Quite tasty.