Heat your annatto oil in a sauce pan placed on medium heat.
Sauté garlic, onions, and bay leaves.
Add in your pork and season with salt and pepper. Let chicken sear on each side for a minute before turning.
Add the rest of your ingredients, vinegar, fish sauce, water, peppercorns and let it simmer for 12 – 15 minutes or until meat is tender and cooked through.
When you add the vinegar make sure you do not stir it and let simmer without the cover to properly cook the vinegar.