New York prisons are to stop punishing inmates with a type of food known as "nutraloaf" or "the loaf", in a change to the state's solitary confinement policy. But what's in a loaf, and is it ever fair to punish prisoners by downgrading their food?

Nutraloaf. Disciplinary loaf. Prison loaf. Special management meal. The loaf.

The blended and often baked block of food, served in some US prisons as a punishment for bad behaviour, comes in a number of guises.

There is no single recipe.

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