Pulse the cauliflower florets in a food processor until you get a pile of cauliflower "rice."
Sauté the onion in 2 tbsp of butter until very translucent and fragrant, stirring in the same direction with a wooden spoon. Deglaze with half the vino (1/4 cup.)
Add in the cauliflower rice and stir. Slowly add the stock in intervals, never drowning it but also not letting it be too stiff or burny. Keep stirring in the same direction.
When you're out of stock and it's all hot and gorgeous, add the rest of the wine and then "mount" with the rest of the butter, incorporating it with the liquid and cauliflower.
Stir in three-quarters of the cheese, and some minced herbs. Top with the rest of the cheese and serve right away.