Rapeseed Oil
3 or 4 whole onions and halved alone the equator
2 table spoon demerara sugar
30g butter
30g plain white flour
600ml brown chicken stock
Preheat onion to 180C
Heat oil in frying pan
Fry onions cut side down for 8-10 mins until blackened
Line roasting tray with foil
Add the onions and sprinkle with demerara sugar and thyme
Drissle with oil and seal the foil cover
Roast for 2 hours until caramelised and soft.
While the onions are still warm scoop out the flesh into foon processor
process to a rich brown pulp.
Make a roux with the flour and butter
Add the chicken stock and onins and reduce by a quarter over a low heat (30-40mins)