Add chicken to your slow cooker.
Add the sliced onions, garlic, Worcestershire, balsamic, and all the seasonings.
Pour in the bone broth.
Stir to combine.
Cover and cook on LOW for 6-7 hours or HIGH for 3-4 hours, or until chicken is fully cooked and the internal temperature reaches 165℉.
I cooked this on LOW for 7 hours and my chicken was falling apart.
Remove bay leaves.
Using two forks, gently shred your chicken a little bit. Return the shredded chicken to your onion sauce.
Whisk the arrowroot (or flour/cornstarch) with your water or bone broth until smooth to create a slurry.
Stir in your slurry the last 10 minutes of cooking to help thicken up the sauce.
Garnish with fresh parsley and serve over mashed cauliflower, mashed potatoes, quinoa, or brown rice.