Pour soy sauce, vinegar, brown sugar and the chicken drumstick in the large bowl. Use your hand to mix it well. Let it marinate for 30 minutes to 1 hour.
Pour vegetable oil in the pan. Once hot, add the chopped cubed potatoes. Do not fully cooked the potatoes. Just make sure it is half-cooked only. The rest will be done when simmering it.
Remove the half-cooked potatoes. Transfer into the plate. Set aside
In a separate pan, add vegetable oil and garlic. Stir for less than 30 seconds.
Add the marinated chicken (exclusing the sauce). Stir to mix
Pour the marinated sauce and water.
Add the bay leaves, peppercorn and chicken bouillon cube. Stir to mix
Cover with the lid. Let it simmer for at least 30 minutes or until the chicken is cooked.
While simmering, you can add the green chilies (optional)
Add the half fried potatoes on the chicken adobo. Cover with the lid and let it simmer for 5 more minutes until the potatoes is soft..
Serve with white rice or any rice, and vegetable side dishes.
Video
Notes
Before starting to cook, marinate the chicken by mixing the soy sauce, bay leaves, garlic, peppercorn and vinegar in a large bowl for an hour. For better flavor, leave it for 6 hours.