Method

1. 1
   Place beef strips in a bowl and add lime rind and juice, fish sauce, soy and sugar.
2. 2
   Cover and marinate for 30-60 minutes in the fridge.
3. 3
   Heat oil in a large wok or frying pan, add onion and garlic and lightly cook.
4. 4
   Add meat and the marinade juices, and brown meat over a high heat, this should take about 2-3 minutes.
5. 5
   Add a pinch of sugar and allow the juices to bubble to reduce slightly.
6. 6
   Add green beans and spring onions, toss well together.
7. 7
   Finish by adding coriander leaves and peanuts.
8. 8
   Serve on a bed of crispy fried rice noodles or steamed rice.