Certainly no gravy or Yorkshire Pud (cooked in same goose fat)
So what does that leave? Some broad beans (which she hates) some peas (ditto) and some carrots. I may splash out on cabbage as well or perhaps my personal favourite "green" ~ Sprouts (which she says make her feel sick)

Never mind she can have pudding ~ Oh dear, what a shame ~ It's jelly and cream both of which have cow derivatives (Gelatin and milk)
Looks like jam sandwiches then.