Heat some oil in a pan. Add the ginger, garlic and onions. Saute for a few minutes until aromatic. Then, add the chicken liver. Saute until they change color. Let them cook until all the liquid dries up.
Sprinkle some black pepper. Add the soy sauce, oyster sauce, and bay leaves. Stir and saute well.
Add the vinegar. Do not stir. Cover the pan and let it simmer for 5 minutes using medium heat. Season with a little sugar for a sweeter hint (optional). Continue cooking until all the sauce is reduced.
If you want a saucy adobo, you can already serve the dish at this point. But if you want a dry version, separate the sauce from the liver and transfer to a container. Leave the liver to the pan and continue cooking. You may add a little oil to fry the liver a little. Continue sauteing until light brown.
Transfer the sauce and the chicken liver to a serving plate. Serve this with a lot of hot steaming rice. Yum
