The two words in the name are the two things to get right, and both go in at the end where you can taste what you are doing.
- Dried mushrooms into a mug of boiling water for fifteen minutes. The soaking liquid is the stock and pouring it away is the mistake.
- Mushrooms chopped. Liquid into the pan through a corner of cloth if it is gritty, topped up to 800 ml, stock cube, ginger.
- Simmer five minutes. Noodles in and cooked.
- Cornflour slaked in cold water first, never dry into the pan, and stirred in. Two minutes to thicken and clear.
- Soy, vinegar and pepper off the heat, then tasted, then adjusted. This soup is a balance and the balance is personal.
Vinegar boiled hard goes flat, which is why it goes in last. If it tastes dull, it is almost always short of vinegar rather than short of salt.
Serves 3.