A prison fight over a chicken parmigiana that left one inmate with two broken eye sockets has landed the offender with more jail time.

Matthew John Horner, 35, was living in the release unit at the Bunbury Regional Prison in December 2011 when the fight happened.

Detective Senior Constable Gareth Reed said Horner was working as the unit cook when the victim, who was working as a cleaner, had criticised the way he had made the dish.

"He said there was too much tomato on top of the chicken parmigiana," Constable Reed said.

Constable Reed said the physical altercation soon followed as a result of the argument.

"They ended up back at the unit later and had a fight," he said.

The victim was taken to hospital by the prison guards and treated for two broken eye sockets.

Horner was sentenced in the Bunbury Magistrates Court on Tuesday to seven months' jail to be served concurrently with a previous sentence.