Ingredients
Method
1.Place beef in a medium bowl with half the peanut butter, 2 teaspoons of the sambal oelek and 2 teaspoons of the kecap manis. Rub peanut butter mixture into beef.
2.Combine remaining peanut butter, sambal oelek and kecap manis in a small bowl. Heat half the oil in a wok over high heat; stir-fry the beef, in batches, until cooked as desired. Remove from wok, cover to keep warm.
3.Heat remaining oil in wok; stir-fry onion and wombok, in batches, until browned lightly. Return onion and wombok to wok with choy sum; stir-fry to combine, then add reserved peanut butter mixture to wok. Stir-fry until choy sum just wilts and mixture is hot.
4.Return beef to wok; toss to combine. Serve with steamed rice, if desired.
