To make the sauce, combine together oyster sauce, light soy sauce, dark soy sauce, fish sauce and sugar in a small bowl. Set aside.
To make basil chicken stir fry, heat vegetable oil in a wok or large frying pan over medium-high heat.
Add onions, garlic and chilies. Stir fry for 2 minutes.
Add chicken. Using a large spoon, break up the lumps and stir fry for about 5-6 minutes or until browned.
Add sauce and chicken broth (stock). Stir to combine. Stir fry for 5-6 minutes or until chicken is cooked through.
Stir in basil leaves. Heat through.
Garnish with chopped chilies and basil leaves.
Serve with steamed rice and fried egg.