Finely chop and quickly fry the fillet steak. Set aside.
Heat the vegetable oil in the wok, add ginger and garlic and fry over a high heat until starts to become golden and toasted. Add the orange peel & fry until it releases citrus notes. Then fry chilli, black beans and chopped onions, for 20 seconds
Add the spring onions and peppers & fry lightly to retain bite. Add the 2 pastes - black bean paste, oyster sauce along with the water and sugar. Then return the meat to the wok.
Finish with the sesame oil. Mix the cornflour with a little water to make a paste and add to the wok to thicken the sauce.
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