Pat chicken dry, season both sides with salt and pepper.
Heat oil in skillet over medium-high. Sear chicken 5–6 min per side until golden. Remove and set aside.
Reduce heat to medium. Add garlic to same skillet, cook 60 seconds, stirring constantly.
Add honey, soy sauce, apple cider vinegar, ginger, and red pepper flakes. Stir and simmer 1–2 minutes.
Return chicken to skillet. Spoon sauce over each piece. Cover and cook on medium-low for 5–7 minutes until internal temp reaches 165°F.
Stir cornstarch slurry and pour into sauce. Stir gently and cook 1–2 more minutes until glossy and thickened.
Garnish with parsley or sesame seeds. Serve immediately.