I tried packaged cauliflower rice when on a self-catering holiday recently - now, I will eat pretty much anything, but I really struggled with that stuff! Couldn't bear it.
Never tried ricing or mashing an actual cauliflower, although I do love it in fresh floret format.
But I buy and use 2 x 1kg bags of
frozen cauli a week, which I either have as rice or mash (I use 250g for a serving - that's 9g CHO).
I microwave it for 5mins, then either chop it in the mini food processor (rice) or use a stick blender (mash). Lots of salt and pepper - yum!
Last night we had bangers and mash - and I whizzed up the cauli with all the sausage fat I poured from the roasting tin. Sooooooo good.
And frozen cauli makes AMAZING cheese sauce! 5 mins in microwave, half a tub of Philly, a handful of mature cheddar, the juice that has come out of the cauli, plus a little water = cheese sauce! Perfect for - *
coughs* - cauliflower cheese, or any kind of oven bake.