Prison meal

It still an evidence that prisoners cook and eat. They have pots and spices to make food more delicious. They season the meat in the kitchen and seasoned well when  the jail is closed at night. 

You look after food at jail because other prisoners will poison you if you became lazy and you could be dead, in the morning you'll smell like you are 3 months old dead.

So also  if you do not have food in prison, you do not  ask someone else to give you food, no matter how hungry you are. If you are lucky they may share their meal with you.

Once your food later  or not at all, you will  have to pay in other ways.