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Cut the carrot, onion and celery into a rough dice.
Heat the oil in the pressure cooker, season the ox cheeks and fry them turning quickly to colour all over and seal them. Remove and keep to one side whilst you fry the vegetables to a golden colour.
Drain any excess oil place the cheeks back into the pressure cooker and add the garlic, thyme, bay leaves and star anise. Pour in the red wine and top up with water.
Bring the pressure cooker up to pressure and cook for 35-40 minutes.
Turn off the heat and leave for 1 hour.
Open the cooker and take out the cheeks and place on a plate to keep warm.
Discard the star anise and bay leaves. Boil up the sauce and thicken with cornflour mixed with a little white wine.
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