Blue Cheese and Celery Sauce

• 1 tbsp olive oil
• large knob of butter
• 2 celery sticks, thinly sliced

Heat a pan over a medium heat and add the oil and butter. Once the butter is melted and foaming, add the celery and onion. Cook for 2–3 minutes, until the onion has softened and the celery is tender, tossing the pan occasionally. Pour in the port and wine, then flambé it off a little by tipping the edge of the pan over the flames very carefully. When the alcohol burns off, stir in the stock and