Stir in the oyster sauce and cook for 2–3 minutes. Add about half of the reserved broccoli cooking water and crumble in half of the chicken stock cube. Bring to a simmer and then add the sesame oil.
Place the grated ginger, beansprouts, spring onions and carrot into a bowl, then add the chicken and mushrooms and season with the oyster sauce, soy sauce, sea salt and ground white pepper.
Add in the tomatoes and cook until softened Add the tomato ketchup and oyster sauce and ... Turn up the heat and reduce the sauce slightly. Add the cooked prawns, chicken or beef and heat through ...