First mince the garlic. Cut the chicken thighs into ½-inch chunks.
In a small bowl, mix together dark soy sauce, light soy sauce, oyster sauce, sesame oil, sugar, and optional MSG to form your sauce.
Heat a pan with oil and cook the chicken until about 80% done, around 6 minutes. Remove and set aside.
In the same pan, add all of your garlic and sauté for about 2 minutes until fragrant. Add in the day-old rice, your sauce, and the cooked chicken. Toss everything together until the sauce coats every grain of rice.
Serve in a bowl and optionally top with crispy garlic and scallions.
