In a skillet, heat cooking oil and saute garlic until slightly brown then add onion and saute until soft.
Then add salt and pepper. Mix for a few seconds than add the oysters. Stir cook for a few seconds until the garlic and onions are mixed with the oysters.
Add the soy sauce, vinegar, bay leaf and water. Cover and simmer for 1 minute.
Stir cook for a few seconds and turn off heat. Separate the oysters in a bowl and leave the rest on the ingredients in the pan.
Simmer again for 2 to 3 minutes until the liquid has evaporated to half. Then put the oysters back in the pan.
Simmer again for 1 minute and serve hot.