Heat olive oil in a large skillet over medium heat.
Add chicken pieces and cook until browned and fully cooked, about 6-8 minutes.
In a bowl, whisk together soy sauce, honey, rice vinegar, sesame oil, and minced garlic.
Pour the sauce into the skillet with the chicken and bring to a simmer.
Stir in the cornstarch slurry to thicken the sauce, cooking for 2-3 minutes.
Sprinkle sesame seeds and green onions over the chicken before serving.