We're having curry tonight, and I've just made this (serves 2) out of 500g Essential Waitrose frozen cauli. Microwaved on full power for 10 minutes, drained, then whizzed in my mini food processor in 2 batches (I HATE the big processor with a passion - too much washing up).
Sometimes I add coriander leaves. Yummy. Oh, and lots of salt and pepper.
I have (once) tried commercial cauliflower rice - now, Snapsy eats pretty much everything, but oh boy that really wasn't nice AT ALL.
A portion of my homemade version is 7.5g carbohydrate. And it's scrummy. I have it with curry, chilli, stroganoff etc. With stew and bolognese etc I have caulimash (750g cauliflower for 2 portions, microwaved for 20 minutes, drained, whizzed with my stick blender with tonnes of salt and pepper, maybe some cheese, definitely some butter).
I don't miss rice, or potatoes. And I buy 4-6kg frozen cauliflower a week.