Step 1

Put the coriander seeds and galangal or ginger in a saucepan. Pour in the stock, bring to the boil, then simmer gently for 5 mins. Leave to stand for 10 mins.

Step 2

Meanwhile, cook the noodles following pack instructions. Drain and keep warm. Return stock to the boil. Add the fish sauce, chillies and garlic, reduce the heat and simmer for 2 mins. Add the prawns and salmon, return to a simmer and cook gently for about 5 mins until both are firm and cooked. Add the spring onions, herbs and lime juice, to taste.

Step 3

Divide the noodles between soup bowls. Using a slotted spoon, lift out the prawns and fish, and place on the noodles. Season the hot stock, pour into the bowls and serve with Spring rolls on the side.