01 -
Peel and chop the onion thinly. Toss it into a pan with some olive oil and cook until it turns see-through.
02 -
Pour in the wine, vinegar, water, thyme, bay leaf, coriander, and sugar. Stir it up together.
03 -
Once it's bubbling gently, mix in the tomato paste, sprinkle some salt, and add a dash of pepper.
04 -
Give everything a good stir, then let it cook on low for about 10 minutes so it thickens.
05 -
Drain those mushrooms, rinse them, and throw them into the mix.
06 -
Keep stirring and let it cook for another 5 to 10 minutes.
07 -
Let it cool down, then serve it nice and cold.