As I delve into more research, I came across this help sheet from the British Chelonia Group.
Native: Whatever is available in their natural habitat.
Captive: These tortoises eat the largest variety of foods of seemingly any other tortoise. All fruits and vegetables, both fresh, cooked, tinned or de-frosted, soaked dog and cat pellets. In particular exotic fruits should be tried like melon, watermelon, peach, grapes, apricots, orange, papaya, cantaloupe. They readily accept apples, pears and plums in their diet. Try them on lettuce, cress, cucumber, carrot (grated or cooked), corn on the cob, clover, dandelion. Feeding will take place at any time of the day or night if light is provided and heat and water are available.
Cited from this website
British Chelonia Group: THE SOUTH AMERICAN TORTOISES.
Half of this contradicts what im beiong told to feed her?? Lettuce? Soaked dog and cat pellets???