"Broccoli contains goitrogens that interfere with thyroid activity and could damage the liver and kidneys. Therefore, although Broccoli is not actually toxic, we would advise you not to feed it to your tortoise."
If you have questions like this, try looking the food up on The Tortoise Table Plant Database first. It's a fabulous online search facility that tells you whether something is suitable to feed or not, how frequently you can feed it and the reason why. https://www.thetortoisetable.org.uk