Vegetarian Demi Glace Sauce
- Place the porcini in a bowl and pour over 500 ml of boiling water and leave them to soak. Heat the oil in a large pan and add the onion. Cook over a med-high heat, stirring constantly until the onion is an even nutty brown, careful not to let it burn.
- Add the carrot and celery and turn the heat to low, then add the tomato puree and flour and cook, stirring regularly for 5 minutes
- add the stock or water, wine, sherry,tamari,the mushrooms and their soaking liquid, and the herbs, peppercorns and all spice.Turn up the heat to medium, cover and simmer for 20 minutes.
- strain through a fine sieve, cool and refrigerate until needed.