The burger fascists will hate me for this, but truly, I love to play around with a burger and this combination really does it for me. It’s always nice to spice things up a bit, and beef loves it. Fresh horseradish is firey and perfect with beef, it also has a fancy for beetroot. Together they form a beefy holy trinity and taste delicious.
The only downside is the beetroot will turn your hands pink. If this is an issue for you, wear gloves, and Bob is your uncle. Or similar.
Try them as meatballs too (which would be a lovely little Xmas snack on a cocktail stick).