Season chicken lightly with salt and pepper and place in slow cooker
In a small bowl (I use a liquid measuring cup) whisk together honey, soy sauce, onion, ketchup, oil, garlic, pepper flakes, and diced dried chilis. Pour over chicken.
Cook on low for four hours or until chicken is cooked through.
Remove chicken from crockpot and set on cutting board, leave the sauce. Dissolve 4 t. cornstarch in 6 T. water in a small bowl. Add to crockpot and stir to combine.
Replace lid and cook sauce on high for 10 minutes for it to thicken.
Cut chicken into bite sized pieces, return to crockpot once sauce is finished cooking and toss to combine.