Step 1

Combine black bean sauce, arrowroot and 1 tablespoon cold water to form a paste.

Step 2

Heat a large wok over high heat until hot. Add 2 teaspoons oil and swirl to coat base and sides. Add one-third of the beef and stir-fry for 1 minute or until sealed. Transfer to a plate. Repeat with oil and remaining beef in 2 batches.

Step 3

Add remaining oil and onion to wok. Stir-fry for 1 minute. Add capsicum. Stir-fry for 30 seconds. Return beef and juices to wok. Add black bean mixture to wok. Stir-fry for 1 minute or until sauce thickens slightly. Remove from heat. Add beansprouts. Toss to combine. Serve over rice.