Inmates need to eat three times per day, I have found out that jail food is the worst, and prison food is only a little better. The inmates should take pride in what they cook, but they don't want to be in jail/prison in the first place. So their is no pride in what they do.
If the jail/prison can grow their own food then all the better. Meat will have to be still shipped in from the outside, but most of the other things can be grown on the site.
That also leads on to the Hard Labor I have been talking about. To make the inmates farm for their food, maybe they would take pride in what they make and serve to the other inmates.