Preparation: Place the potatoes, carrots, and onions at the bottom of the Crock Pot.
Season Chicken: Sprinkle the chicken thighs with salt, pepper, thyme, and rosemary. Place them on top of the vegetables.
Add Liquids: Pour the chicken broth and minced garlic over the chicken.
Cook: Cover and cook on low for 6-8 hours, until the chicken is tender and cooked through.
Thicken Sauce (Optional): Mix cornstarch with water to create a slurry. Stir into the Crock Pot in the last 30 minutes of cooking to thicken the sauce.
Serve: Garnish with fresh parsley if desired. Serve hot with the vegetables and sauce.