Lightly rinse fillets and lay them on a steaming plate.
Mix the oyster sauce and light soy in a bowl and spoon over the fillets.
Put the sliced ginger and some spring onion over the fillet.
Steam over medium heat for about 6 minutes (sliced fish cook faster).
Discard the ginger and onion.In a small bowl, toss in the chopped garlic and oil. Mix well.
Heat the garlic in a pan over medium heat for about 1 to 2 minutes or until crispy.
Spoon the crispy garlic and oil over the fish, garnish and serve.