Step 1: Prepare Teriyaki Sauce :In a small bowl, combine soy sauce, honey, rice vinegar, sesame oil, and ginger. Mix cornstarch and water in a separate bowl and set aside.
Step 2: Cook Chicken : Heat oil in a large skillet over medium heat. Add diced chicken, season lightly with salt and pepper, and cook 5–6 minutes until browned and cooked through.
Step 3: Sauté Vegetables : Add onion, garlic, carrot, and bell pepper to the skillet. Cook 3–4 minutes until vegetables are tender-crisp. Stir in water chestnuts and green onions; cook 1 more minute.
Step 4: Add Teriyaki Sauce : Pour the prepared teriyaki sauce over the chicken and vegetables. Stir in the cornstarch slurry to thicken. Simmer 2–3 minutes until sauce is glossy and slightly thickened.
Step 5: Assemble Wraps : Spoon chicken mixture into lettuce leaves, using them as cups. Sprinkle with sesame seeds and extra green onions.