Well, I've been a vegetarian since I was nine, and even before then I don't think I ever had roast beef and Yorkshire puddings (my mum hated them), but I'll have a go at answering your questions.
1) of course, any vegetables would do. I'd probably go for seasonal ones.
2) there's no reason why you couldn't have wine with it. As far as I'm aware you can have whatever drink you want.
3) apple crumble, I love apple crumble. You can have other fruit in crumble like rhubarb and blackberries (which also work well with apple apparently, but I just stick with good ol' apples).
