Jamie Oliver get ahead best ever gravy recipe on Jamie’s Best Ever Christmas

Jamie Oliver makes get ahead gravy that is the best ever gravy in the world on Jamie’s Best Ever Christmas.

The ingredients are: 2 celery sticks, trimmed and roughly chopped, 2 carrots, roughly sliced, 2 onions, quartered, 5 each fresh bay and sage leaves, 4 sprigs of fresh rosemary, 2 star anise, 2 rashers of smoked streaky bacon, 8 chicken wings, 30ml olive oil, 4 tbsp plain flour, 60ml sherry or port (optional) and 2 dessertspoons cranberry sauce.