In a mixing bowl, combine brown sugar, vinegar, soy sauce, chicken bouillion, and black pepper. Set aside.
Heat a pan on low heat. Add oil, garlic, and bay leaves.
Gently cook the aromatics for about 2 minutes, until the garlic is golden brown and oil is fragrant. Use caution to avoid burning the garlic. Discard the bay leaves. Place the fried garlic on a paper towel to cool.
Add the day old rice to the pan with garlic oil. Stir fry until the rice is heated and the grains are well separated.
Add butter, onion, and chicken. Cook for a few minutes until the onion is wilted and chicken is heated through.
Add adobo sauce, garlic powder, and a pinch of MSG (optional.)
Serve with fried garlic, fried egg, atchara, green onions, and tomatoes.