I mix shredded squash with greens and Mazuri twice a week. My torts love squash but not so much Mazuri. Adding the shredded squash guarantees they will eat the Mazuri since they can't separate the two. I WIN!!
I prefer to bake it with brown sugar and bacon for my family. For the tortoises, it depends who is going to get it. For some it is cooked, for some grated, and others get it as is.
If you buy a cheese grater with very tiny holes, you can grate hard things like carrots and acorn squash through the tiny holes and babies can eat it uncooked.