In a measuring cup or bowl, combine soy sauce, vinegar, black pepper, and ginger(+ a sprinkle of red pepper flakes, OPTIONAL). Place the chicken pieces in a baking pan. Pour the adobo sauce mixture over the chicken then add the garlic and dried bay leaves.
Cover the pan with a foil. Put it in the preheated oven, 365°, to bake for 35 minutes. After the initial baking, take the pan out of the oven. Carefully remove the foil.
Add the peeled and cubed potatoes. Return the pan into the oven, uncovered, to bake for another 35 minutes.
