Pat the chicken dry so it browns nicely instead of steaming. Marinate it with soy sauce and sesame oil to infuse flavor into the meat. Let it rest at least 20 minutes for better taste.
Heat a skillet and cook the chicken pieces without overcrowding the pan. Add minced garlic and ginger while cooking so their aromas coat the chicken. Cook until both sides turn golden.
Sprinkle brown sugar into the pan and stir gently as it melts. The sugar coats the chicken, forming a rich caramelized layer. Keep the heat moderate to prevent burning.
Pour in chicken broth and rice vinegar, scraping flavorful bits from the pan. Season with salt and pepper and let everything simmer. This step blends sweet, savory, and aromatic flavors.
Slowly add the cornstarch mixture while stirring continuously. The broth becomes slightly thick and glossy. This helps it cling to the chicken and rice better.
Rinse jasmine rice until the water runs clear to remove excess starch. Cook it with measured water until tender and fluffy. Let it rest briefly before serving.
Spoon warm rice into bowls and top with caramelized chicken. Ladle the garlic-ginger broth over the dish. Finish with sliced green onions for freshness.