Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
In a large bowl, whisk together the soy sauce, honey, sesame oil, rice vinegar, grated ginger, and minced garlic until well combined.
Add the chicken pieces to the bowl and toss to coat them evenly in the marinade. Let the chicken marinate for at least 15 minutes, or up to 1 hour in the refrigerator for more flavor.
Spread the marinated chicken in a single layer on the prepared baking sheet.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and caramelized, stirring halfway through.
While the chicken is baking, mix the cornstarch and water in a small bowl to create a slurry.
Remove the chicken from the oven and drizzle the cornstarch slurry over it. Toss to coat and return to the oven for an additional 5 minutes to thicken the sauce.
Once done, remove from the oven and sprinkle with sesame seeds and sliced green onions. Serve over cooked rice.