Step 1

Place the noodles in a bowl and cover with boiling water to soften.

Step 2

Heat oil in a large saucepan over medium heat, add the onion and cook for 1-2 minutes until softened. Add the capsicum and cook for a further minute. Add the curry paste and cook, stirring, for 1 minute. Add the vegetable stock and kaffir lime leaves, bring to the boil, then add the beans and cook for 1 minute further. Add spinach, coconut milk and prawns and cook until everything is just heated through. Season with the fish sauce.

Step 3

Drain the noodles and divide between 4 serving bowls. Pour over the soup, top with coriander and serve with lime on the side.