My brother in-law is vegetarian - vegan turkey last year, which I had a bit of, and it was surprisingly decent. Not something I'd pick for myself though.
This year, me and the Mrs will be hosting, and the in-laws will be coming over. Among a couple meat options, we're going to do a homemade "no" beef wellington (vegan) for the brother in-law. I've never had this "no" beef wellington, but it's a recipe that the Mrs uses to make it, and her brother likes it apparently, so it must be decent.