In a large, shallow dish, mix soy sauce, honey, miso paste, lime juice, ginger, garlic, chilli flakes and 2 tablespoons of cold water. Add the steak and marinade for at least 10 minutes.
Heat olive oil in a large frying pan to very hot.
Remove the steak from the marinade and cook for 2 - 3 minutes on each side. Remove to a plate, cover with foil and keep warm.
Add red onion to the frying pan and cook for a minute before adding green vegetables. Quickly cook until tender
To serve
Heat the rice as per packet instructions.
To make the sauce, pour the marinade into a small saucepan and boil for 2 minutes, stir in cornflour paste and boil for a minute until thick
Slice the cooked steak and return to the pan with its juices, green vegetables and coat in the sauce.
Spoon rice into warm bowls, top with vegetables and beef. Drizzle with sauce before serving.