Step 2

Mix together the lime juice, cayenne, sugar and fish sauce in a bowl.

Step 3

Heat the oil and fry the prawns until warmed through. Add the spring onions and noodles and toss.

Step 4

Pour in the lime juice mixture, then stir in the beansprouts and half the peanuts and coriander. Cook for 1 minute until everything is heated through.

Step 5

Pile into a large dish and scatter with the remaining peanuts and coriander. Serve with lime wedges and sweet chilli sauce.