In a large wok or saucepan, heat oil and cook garlic, spring onions, ginger and chillies over medium/high heat for 2-3 minutes.
Add coriander and lime rind/juices and give a quick stir.
Pour in chicken stock, coconut milk and prawns then shimmer for 5-10 minutes to cook the prawns completely and let flavours to develop.
Add the noodles and simmer for a further 3-4 minutes until noodles are soft. Season with salt and pepper to taste.
Serve in noodle bowls with coriander to garnish