In a small bowl, whisk together the sauce ingredients
Rinse the chicken and trim any excess fat. Place in the slow-cooker. Pour sauce over chicken, flipping each piece to ensure all sides are coated.
Cook on low for 4 hours
Remove the chicken and cut into bite-size cubes
Remove the sauce and transfer to a small saucepan. Over medium heat, let it simmer for 20 minutes, or until it has reduced by half and is thick and shiny.
Toss cubed chicken in thickened sauce, and let sit at least 10 minutes before serving.
Sprinkle with sesame seeds and serve over brown rice