In a pan, heat 1 teaspoon of sesame oil over high. Add steak and cook for 2 minutes on each side, or until cooked to your liking. Remove from pan and set aside to rest.
Meanwhile, in a bowl combine sauces and the remaining sesame oil with hot water. Set aside.
Return pan to a medium-high heat. Add choy sum, garlic, ginger and green beans and stir-fry for 3-4 minutes. Add edamame beans and stir-fry for 2 minutes.
Slice in beef in 1cm slices. Add beef and any juices back in the pan. Remove pan from heat, then add sauce and let it bubble and reduce, returning to heat if necessary. Add cashews and stir.
Divide rice and beef between 2 plates. Garnish with crispy seaweed, if desired.
Notes
From: Bezzant, Niki; in Healthy Food Guide Meals for One & Two (2018) Healthy Life Media