I've taken to using grated zucchini sauteed in olive oil as a pasta
substitute under things like chicken breast cooked in pasta sauce. Maybe
she'd like it.

In any case, as others have said, she is going to have to start taking some
responsibility for her own nutrition, and to try to overcome this excessive
finickiness. Allergies are one thing, but she seems to have an awful lot of
extreme food phobias.