In a pot of boiling water, place quail eggs, cook for about 8 minutes. Remove from heat. Then transfer the eggs into a bowl of water and ice cubes to cool, about 10 minutes, then peel. Discard the peel. Set aside the eggs.
In a saute pan, set over medium high heat, heat oil. Add the pork; cook, stirring often, until brown, about 10 minutes. Transfer to a plate and set aside. In the same pan, reduce heat to medium, then add the garlic; cook, stirring constantly, until fragrant, about 5 minutes. Return the pork to the pan. Stir in vinegar, soy sauce, pineapple juice, water, fish sauce, ground black pepper and bay leaves. Bring to a boil then simmer, stirring occasionally, until pork is tender or liquid has reduced by half. Add the quail eggs, stir to combine.