Grow her some prickly pear cactus....she will love you for it. The fruits of the cactus are good for them, and they love it! I used to snag a couple of the "pear" fruits off of the gigantic cactus at my grandmothers every time we'd go for a visit and the land turtles loved me for it.
I don't want to give you the whole speech on tortoise care if you already know the basics (they can't swim, they are herbivores, they need plenty of UVB, etc)...but if you have any questions, I'd be happy to try to help, and if I can't, I can point you in the right direction.