Prepare the Sauce: In a small bowl, mix soy sauce, honey, rice vinegar, sesame oil, and cornstarch slurry. Set aside.
Cook the Chicken: Heat vegetable oil in a large skillet over medium-high heat. Add the chicken, salt, black pepper, and red pepper flakes. Stir-fry for 5-7 minutes until golden brown and cooked through.
Add Ginger and Garlic: Stir in the grated ginger and minced garlic, cooking for another minute until fragrant.
Toss in the Sauce: Pour the sauce over the chicken, stirring continuously until the sauce thickens and coats the chicken evenly (about 2 minutes).
Garnish and Serve: Sprinkle with sliced green onions and sesame seeds. Serve hot with steamed rice or noodles.