Marinade chicken cubes with some soya sauce, pepper and dash of sesame oil. Heat up oil in the wok and add in the chicken. Brown it lightly. Place the various vegetables in starting with those harder to cook. Quickly stir fry them. For seasoning, pour in some oyster sauce to taste. You may want to add a little water to soften your ingredients. Stir fry till it's dried. Dish up and scatter some roasted cashew nut on top before serving.