Sour Soup made from A Fish Head with Orange Mushrooms

• 1 head of a pa va (i.e. LABEO DYOCHEILUS—), cut into big pieces and washed
• 1 soupbowl of orange mushrooms (hed saed)—

Put 1½ metal jugfuls (1½ pints) of water in a pot on the fire. Add salt, the knotted lemon grass and the knotted spring onions. When the water comes to the boil, add the pieces of fish head