That will not allow a chelonian to properly absorb the ultraviolet rays. If you feed grass or weeds from your yard, make sure that no pesticides have been applied, and that weeds are non-toxic. Other vegetables that can be fed in lesser amounts include spinach, Swiss chard, red leaf, romaine, beet greens, thawed frozen mixed vegetables, peas, cauliflower, green beans, squash, green peppers, and clover. Hibiscus flowers and leaves, grape leaves, carnations, roses, nasturtiums and squash flowers are also relished. Alfalfa pellets can be soaked and offered.
Tortoises really seem to like fruits.
You may have seen commercial tortoise diets offered in pet stores. These can be soaked and offered as a small portion of the diet. I raise several species of tortoises, and I have been pleased with the quality of commercial diets, which I feed in addition to veggies and fruits. To avoid having a tortoise selectively choose only preferred food items, the daily diet should be chopped small enough so that the tortoise can't pick and choose. Daily, several dark green leafies should be offered, as well as some other veggies and a small amount of fruit.