The Oxtail Stew That Never Cooled
A small restaurant in Ocho Rios runs a Sunday brunch buffet from 11:00 to 15:00. At 20:00 the kitchen has about 8 litres of oxtail stew left in a 40 cm deep pot. The cook covers the pot and places it in the walk-in cooler, which reads 6 °C. By 08:00 the next day the centre of the stew is 18 °C. She reheats the whole pot on the stove until it steams, then holds it at 52 °C on the buffet for four hours. Leftovers are returned to the cooler in the same deep pot. On Tuesday a customer complains of stomach cramps. The environmental health officer asks for the temperature log; the restaurant has none, and the cook says she 'always reheats until it bubbles'.
1. Identify every temperature-control failure in this sequence, with the correct target for each step.
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There are several failures. Cooling: an 8-litre pot placed in a 6 °C cooler will cool far too slowly; the centre was still 18 °C after 12 hours. The target is to take the food from cooking temperature to 21 °C within 2 hours, and then to 5 °C or below within a further 4 hours. The deep pot and lid make this almost impossible. The cooler itself: 6 °C is above the recommended 5 °C maximum for cold holding, so even the air was marginal. Reheating: 'until it steams' is not a measured endpoint. Reheated food should reach at least 74 °C throughout and be brought through the danger zone within 2 hours. Hot holding: 52 °C is below the hot-holding minimum, which should be 60 °C or above. Four hours at 52 °C allows bacterial growth. Leftovers: returning the whole pot to the cooler repeats the cooling failure. Monitoring: no log means none of these steps can be verified.
2. Describe how the stew should have been cooled and reheated, and what should happen to the leftovers now.
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Cooling should start immediately after cooking. The stew should be divided into shallow, uncovered pans no more than about 5 cm deep, or placed in an ice bath with stirring, or cooled using a blast chiller. It should reach 21 °C within 2 hours and 5 °C within 4 more hours, and the times and temperatures should be recorded. Once cold, it should be covered, labelled with the date and batch, and stored under refrigeration. Reheating should be rapid and measured: bring the stew to 74 °C or above throughout, stir to avoid cold spots, and check with a probe thermometer. If it cannot be reheated within 2 hours, it should be discarded. Hot holding must be at 60 °C or higher. The leftovers from the 52 °C buffet should be discarded, because they have been in the danger zone for four hours. The restaurant should not serve them and should not cool them again.
3. The officer finds no temperature records. What should the restaurant put in place before the next buffet, and how would the officer verify it?
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The restaurant needs a simple temperature monitoring system: a calibrated probe thermometer, a written procedure for cooling, reheating and hot/cold holding, and a log recording the food, time and temperature at each step. Staff should be trained to use the thermometer and to know the critical limits: cold holding at 5 °C or below, hot holding at 60 °C or above, reheating to 74 °C. The buffet should have a plan for time as a control if temperatures cannot be maintained, with a documented four-hour maximum and discard times. The officer can verify by observing a full cooling and reheating cycle, checking the thermometer against ice water, reviewing the log over several days, and taking temperatures independently. The officer should also require the establishment to discard suspect food and to demonstrate that the cooler can hold 5 °C or below. A written warning or notice may follow if the system is not in place.