It is a bit of a challenge when you have to provide different meals. I'd suggest -
A couple of tasty, well flavoured veggie cheeses like Godminster. Great for lunches or grating over main courses.
Pouches of pulses and/or grains - there are lots of good ones now like Puy lentils or quinoa and wild rice. These are brilliant to have on standby for either hot dishes with a herby tomato sauce, or as salads with a few chopped veg and a dressing.
Some veggie chilled supermarket foods like falafels or arancini, but I wouldn't recommend ready meals like lasagne etc.
Maybe also think about doing a couple of completely veggie meals for all the family to share, so that your god daughter doesn't always feel like the awkward squad!
If baking is your thing, gluten free flour and baking powder are available in supermarkets now and there are lots of recipes on t'interwebs.
I hope both she and you will enjoy her visit and have some happy meals together!
