I have been there several times and spoke with the manager and head cook. Although they (servers) will tell you that it is veg friendly, the beans and tortillas, lard etc. I think the only vegan option is the white rice. but that doesn't make much of a meal. Beware if you ask they will lie to you. a shame.
They lie- as has been noted their 'vegetarian burrito' and other options with rice are NOT vegetarian- we were very disappointed to learn that all of their rice is made with chicken broth after eating here for months. I really hope they fix this as I think it is probably due to confusion about what 'vegetarian' means. If not, shame on them for being dishonest with the public.