The meal at the Railway Hotel in Hornchurch, Essex, in December 2012 also left 33 others ill with food poisoning.
Mehmet Kaya and manager Ann-Marie McSweeney were sentenced to 12 and 18 months respectively after being convicted of falsifying food safety records.
Mitchells & Butlers, the chain which owned the pub, was fined £1.5 million after being found guilty of placing unsafe food on the market.
Della Callagher, 46, died two days after eating the turkey dinner, which a Havering Council investigation found was either not cooked or reheated properly.
Kaya and McSweeney forged records relating to the cooking of the turkey meat, hindering the investigation into the cause of the poisoning.
Judge Alastair Hammerton said there had been “systematic failings” in record keeping at the Railway Hotel.
“I am satisfied that when the decision to fabricate records was reached, both of you suspected that inadequate care had been taken by someone in respect of storage and/or cooling and/or cooking of turkeys that was to be served on Christmas Day,” he said.
Addressing McSweeney, he added: “I am satisfied that you were in charge and in control of the cover-up, that no cover-up could have occurred had you decided not to embark on it.”