I'm a lacto/ovo vegetarian and almost all the CS places have a vegetarian option, some are more of a substantial meal than others. Like at Flame Tree BBQ you can get a fruit plate or salad (w/o chicken) - both are not very filling or a meal in my opinion.
Yak & Yeti CS doesn't have a vegie option. AK sucks for vegetarians in my opion. I never trust China even though they say vegetarian stir fry because they are'nt ever clear on the stock they use.
My favorites: Norwary & France have a great veggie quiche/torte things.
Mexico has cheese empanadas, pretty good but a little greasy
Tortuga Tavern has a veggie burrito, black beans and tons of toppings from the bar.
Columbia's hummus sandwich
Main St. has a tomato and moz. cheese sandwich
Pinochios has pasta with marinara but it gave me heartburn
Backlot's sandwich is good.
ABC commissary has a ginger salad that I liked
Pop Century foodcourt has lots of veggie options, I'm not sure about others beside Riversides Pasta & Salads your way.
She should be able to find something besides pizza, but maybe not always at the place everyone else wants to eat.