DH's family are with us for Christmas. They'll be 11 of us to cook for and BIL with obviously need something to replace the Turkey, no problem. He'll also need separate gravy, hardly any bother. I usually make a couple of stuffings and make sure one is meat free, again, no bother. He also likes to have some vegi sausages to replace the pigs in blankets.
I like to do a good job with xmas dinner and I love doing the spuds in goose fat. I ponder over this every time we have them for xmas. It's a PITA having to pretty much cook a separate vegi dinner alongside a traditional one, find space in the oven and get all the timings right.
Would it really hurt, for one day, if he was unknowingly more flexible?
The rest of the year when we see them, I just make something vegi for all of us, but this is xmas dinner and I like going to town a bit.
So; a. Would he notice? b. Would it be really, really bad?
Shocking manners and utterly disrespectful to lie to him. Do as others have said, two types of potatoes, boiled or mashed and goose fat roasted. Hell, you can even do a jacket in the microwave and scoop out the inside, but don't lie to him.
It would be pretty bad, yes. Why not ask him if he'd mind? It must surely be no more complicated than making an extra stuffing for people who "have to" have suet in theirs... I'm a committed carnivore myself btw!
Vegetarians stop producing the enzyme that allows them to digest meat. So he might end up having a very uncomfortable afternoon/evening.
I think you should just have a chat to him about it. I'm vegie too, and I wouldn't expect the person catering to go to that much trouble on my behalf. But I also would be very upset if they fooled me into eating something non-vegetarian. He will be used to these kinds of issues - just be upfront. At the end of the day, it's only potatoes - he can survive without them!
reminds me of last xmas when I cooked for 12 people and my sil and her partner who are vegatarian pointed out just as I was serving the meal up that they could not have pots as they where cooked in goose fat (i had totally forgotton) they had a lovely veggie meal cooked for them and veggie gravy too.
Anyhow that was fine and I did not serve them any, and they then both proceeded to eat my sausage meat and turkey skin
I was gobsmacked as obviously turkey skin and sausage meat are meat
I was well peed off
<disclaimer - they did know the sausage meat and skin where the real dead>