Cut the chicken breasts into small bite-sized pieces. Season with a little salt and black pepper.
In a small bowl, mix together the soy sauce, honey, brown sugar, ketchup, minced garlic, and grated ginger. Stir well.
Heat the vegetable oil in a large pan over medium heat.
Add the chicken pieces to the pan. Cook for 5–7 minutes, stirring often, until the chicken turns golden brown and is fully cooked.
Pour the sauce mixture into the pan with the chicken. Stir well so all the chicken pieces are coated with the sauce.
In a small cup, mix the cornstarch with 2 tablespoons of water.
Pour the cornstarch mixture into the pan. Stir continuously for 1–2 minutes until the sauce becomes thick and sticky.
Taste and add more salt or black pepper if needed.
Turn off the heat and transfer the sticky chicken to a serving plate.
Garnish with sesame seeds and chopped green onions before serving.