Here’s the summary for the wikipedia article you mentioned in your comment:
Nutraloaf (also known as meal loaf, prison loaf, disciplinary loaf, food loaf, lockup loaf, confinement loaf, seg loaf, grue or special management meal) is food served in prisons in the United States (and formerly in Canada) to inmates who have misbehaved, abused food, or have inflicted harm upon themselves or others. It is similar to meatloaf in texture, but has a wider variety of ingredients. Prison loaf is usually bland, even unpleasant, but prison wardens argue that nutraloaf provides enough nutrition to keep prisoners healthy without requiring eating utensils.