1. In a bowl, combine the soy sauce, honey, rice vinegar, sesame oil, minced garlic, and grated ginger. Stir well until the honey is dissolved.
2. If desired, pound the chicken breasts to an even thickness for quicker and more even cooking.
3. Place the chicken breasts in a shallow dish or a resealable plastic bag. Pour the soy sauce mixture over the chicken, ensuring it is well coated. Marinate in the refrigerator for 1 hour (optional) to allow the flavors to develop.
4. Preheat the grill or a large skillet over medium-high heat.
5. If using a skillet, add a small amount of oil to prevent sticking. Place the marinated chicken breasts in the skillet or on the grill.
6. Cook the chicken for approximately 6-8 minutes per side, or until the internal temperature reaches 75°C (165°F) and the chicken is cooked through.
7. While the chicken is cooking, pour the remaining marinade into a small saucepan. Bring it to a boil and let it simmer for a few minutes to reduce and thicken. If desired, mix the cornstarch with a little water to create a slurry and add it to the saucepan to further thicken the glaze.
8. Once the chicken is cooked, remove it from the heat and brush or drizzle the soy glaze over the chicken.
9. Garnish with chopped green onions and sesame seeds, if desired.
10. Serve the soy glazed chicken with steamed rice or your favorite side dishes.
Please note that the quantities provided are approximate and can be adjusted according to your preference. The calorie count may vary depending on the specific brands and ingredients used.