Clams in Oyster Sauce

Heat the oil in a large pot with a lid over medium heat. Cook the onion and garlic in the hot oil until fragrant 3 to 5 minutes. Add the ginger to the mixture and cook another 2 minutes. Stir the oyster sauce into the mixture; cover and cook another 2 minutes. Pour the water into the mixture cover and cook another 2 minutes. Add the clams; cover and cook until the majority of the clams have opened about 5 minutes. Discard any clams which do not open. Serve immediately.