I can't eat dairy, so I did a variation of this and made "chicken gravy" tonight that was ABSOLUTELY DELICIOUS.
I took 32 oz chicken broth (swanson brand carton, but I'm sure that doesn't matter), and reduced it by half. Chopped the cauliflower and threw that in with a good dash of garlic salt. Cooked it about, eh, 15 minutes or so until soft, then threw it in the blender.
It is SO GOOD served over grilled chicken, and so far a good way to trick yourself (and your kids and SO lol) into eating their veggies

The consensus here is that you can't taste the cauliflower at all. I'm thinking it's a combination of the garlic and the strong chicken flavor that comes from reducing the broth in the beginning.
Thanks for the idea! I'd have NEVER thought to do this!