Cut the chicken breasts into small bite-size pieces. In a small bowl, mix cornstarch and water until smooth. Set aside.
Heat oil in a large pan over medium heat.
Add the chicken pieces to the pan. Cook for 5–6 minutes, stirring often, until the chicken turns golden and is fully cooked.
Add the minced garlic and cook for 30 seconds until fragrant.
Add chili sauce, soy sauce, chili flakes, honey, salt, and black pepper. Stir well to coat the chicken evenly.
Pour the cornstarch mixture into the pan. Stir continuously for 1–2 minutes until the sauce becomes slightly thick and glossy.
Turn off the heat and sprinkle chopped spring onions on top.
Serve hot with rice, noodles, or fried rice.