Heat oil in a large skillet over medium-high heat. Season chicken with salt and pepper, then sear for 4–5 minutes per side until golden. Remove and set aside.
Reduce heat to medium and cook garlic and ginger for 30 seconds until fragrant.
Add apple juice, brown sugar, ketchup, vinegar, soy sauce, water, and bourbon. Stir and bring to a simmer.
Whisk cornstarch and water together, then stir into the sauce. Cook 1–2 minutes until thickened.
Return chicken to the skillet and simmer 3–4 minutes until fully cooked and coated in sauce.
Garnish with green onions and sesame seeds. Serve hot.