Jim Cassidy wrote: The cauliflower will be basted with olive oil,....... and then roasted till it browns up a little.
Not a little - make it a lot!
Since you don't like cauliflower, Jim, you've most likely not tried roasted cauliflower steaks but the roasting changes the taste completely, it becomes nutty. We have roasted cauliflower steaks regalarly after first having them as the vegetarian option on a Viking River Cruise.
I cut the steaks as thick as I can, going out at an angle and roast them for an hour, turning once, till the edges are almost black.
And as red wine lovers, we have red. Last 6 times we had it we had a Minervois GSM blend, a Chilean Carignan, a French Moonseng, a Uruguayan Tannat - so usually I pick a wine I don't reserve for other dishes, but one time I was pushed and picked a Medoc claret. It's a dish that goes well with red wine.
I really cannot see why your vegan guests can't enjoy the Ridge Merlot or Cab. If I was dining with you I'd feel very much second class seeing the others having these great wines while being fobbed off with Conundrum.