I made these a couple of days ago as I was recipe testing for the Holidays.
Altho I'm not a big fan of cauliflower, these tatoes were okay. We could definitely taste that bite that cauli tends to have and don't think they would keep well for another day.
The gravy was yummo. I'd recommend cutting down in the garlic department as I put half of what he called for and that was still too much for our taste buds. I ended up having to add more veggies to disguise the taste. Oh, and I used criminis and button mushies as I had no portobellos.
I served them with my own version of nut turkey/stuffing. (THE best we've tasted so far). See recipe here