Begin by cutting the chicken thighs into bite-sized pieces, ensuring they are uniform in size for even cooking.
In a mixing bowl, whisk together the soy sauce, honey, sesame oil, minced garlic, grated ginger, and rice vinegar until well combined.
In a separate small bowl, mix the cornstarch with water to create a slurry. This will help thicken the sauce later.
Heat a large skillet over medium-high heat and add a drizzle of oil. Once hot, add the chicken pieces in a single layer, cooking until they are browned on the outside, about 5-7 minutes.
Pour the sauce mixture over the chicken in the skillet and stir to coat evenly. Lower the heat to medium and allow it to simmer for about 10 minutes, stirring occasionally.
Add the cornstarch slurry to the skillet and stir well. This will thicken the sauce, making it sticky and glossy. Cook for an additional 2-3 minutes until the sauce has reached your desired consistency.
Remove from heat and let it sit for a couple of minutes to cool slightly and thicken more if needed.
Serve hot, garnished with sesame seeds and chopped green onions, over rice or with your favorite side.