Heat oil in large saucepan or Dutch oven over medium-high heat. Add onion and garlic, and saute until fragrant.
Add remaining ingredients (pork, vinegar, soy sauce, bay leaves, and pepper). Bring to the boil. * Lower heat, cover, and simmer for 30-45 minutes, until pork is tender. * Alternatively, put into 250-degree oven to simmer.
* Notes * For more sauce, double the vinegar and soy sauce. * Recipe multiplies easily. * Flavors are even better the next day! * Adobo flakes: Shred cooked adobo. Fry shreds in a little oil. Every so often, add a spoonful of the sauce. Cook until shreds are crisp and deeply seasoned. Eat with rice and fried egg.