01 - Arrange chicken thighs or breasts in the bottom of the slow cooker, ensuring even distribution for consistent cooking.
02 - Whisk together soy sauce, honey, ketchup, rice vinegar, sesame oil, minced garlic, grated ginger, and red pepper flakes in a medium bowl until fully incorporated.
03 - Pour the sauce mixture over the chicken, turning pieces to coat completely. Cover and cook on LOW for 4 hours or HIGH for 2 hours until chicken reaches 165°F and is tender.
04 - Transfer cooked chicken to a cutting board. Shred using two forks or cut into bite-sized pieces. Set aside while preparing the sauce.
05 - Whisk cornstarch and cold water in a small bowl until smooth. Stir the slurry into the hot sauce in the slow cooker and mix well to prevent lumps.
06 - Return shredded chicken to the slow cooker, stirring to coat with the thickened sauce. Cook on HIGH for 20-30 minutes until sauce reaches desired consistency.
07 - Plate the sesame chicken hot, generously topping with toasted sesame seeds and fresh green onion slices. Serve over steamed jasmine rice or with stir-fried vegetables.