Can't think of the brand off the top of my head, but there is a fully vegan (and gf) sausage available from supermarkets, it's located with the cold vege options. Um Sanitarium has a vege roast with is vegan, but avoid a majority of their other meat products as they aren't vegan. You could offer falafel as an alternative to meat products.
Vegan for a year and my mind has gone blank on everything apart from what I still eat
I would even just ask her (she's probably still learning too if she has only just turned full vegan, I know I took a while) what she would like, it might open it up to her offering to bring her own and just have salad provided.
I'll think on this a little more and get back to you.