Marinate the chicken with the Worcestershire sauce, soya sauce, pepper and salt. Let it marinate for at least 30 minutes if not longer.
Heat a non stick pan on the stove and once hot place the chicken in. Cook for 2-3 minutes on a high heat till the chicken gets a nice char on it and then flip over.
Pour any remaining marinade into the pan and turn down the heat and let the chicken cook for about 4-5 minutes. Flip it over and cook for another minute or two and then remove from the pan once fully cooked.
In the same pan add the mushrooms, season with salt and also add some water to deglaze the pan. You can also use green beans or broccoli or any vegetable you like. Basically we want to use up all the good bits in the pan.
Then add the resting juices from the chicken back into the pan and cook till all the liquid evaporates and the mushrooms are nicely caramelized.
Serve them together and garnish with the sesame seeds and chop the spring onion and sprinkle all over.