1.Blend or process garlic and chillies until mixture is chopped finely.
2.Heat half the oil in wok, stir-fry garlic mixture until fragrant. Add beef; stir-fry, in batches, until cooked through.
3.Heat remaining oil in cleaned wok, stir-fry beans and capsicum until tender.
4.Return beef to wok with sauces and onion, stir-fry until hot. Sprinkle over nuts, serve with lime wedges, if you like.
Snake beans are long (about 40cm), thin, round, fresh green beans, Asian in origin with a taste similar to green or french beans. Used most frequently in stir-fries, they are also called yard-long beans because of their (pre-metric) length. Kecap asin is a thick, salty, dark soy sauce. It is available from Asian food stores and some major supermarkets.