If they were willing to part with some of the Mummy gift shop space, they could put a little cafe/bakery in. Nothing that would be cooked hot because it would be too small of a space and likely wouldn't have a kitchen (I imagine it as being a sandwich/coffee/pastries place and they would just prepare the food in a kitchen elsewhere), but it would get the job done.
IMO, the Mummy gift shop is too large anyway and I rarely see people buying things there.