It would be helpful to have an idea what you're planning for the meat-eaters, so that we don't provide recipes that require large amounts of work or ingredients aside from what else you're making. For example, I have a couple of good vegan stew recipes but if nothing overlaps with what you're making for the others, it would be a pain to do for one person.

Also, depending on your other main course, you might well be able to adapt for the vegan without making a whole separate meal.