Oh wow, talking about bringing out the best in beets! I've never tried the red wine vinegar, but maybe I should. You know, as a kid I always thought I hated beetroot, as the first one I tried came out of a glass had this weird taste. So it took me years to find out that it was actually one of my favorite veggies... raw. Still, I've become curious to try.
As for the cauliflower, I always thought I knew this great secret about it that you could mash it up, beating mashed taters any day. But seems like you're in on that secret! :-) I especially like that you chose the purple variety. Awesome stuff!