Arrange Red Onion, Potatoes, and Garlic Cloves into a 6 quart Slow Cooker Bowl, creating a nest for the Chicken.
1 peeled Red Onion, 8 ounces Potatoes, 5 peeled Garlic Cloves
Combine Tarragon, Thyme, Salt, Paprika, Pepper, Garlic Powder, and Olive Oil in a Bag and shake to make a Seasoning Paste.
Remove the Giblets and Neck from the Chicken. Dry the outside and inside of the Chicken with Paper Towels.
Spread the Seasoning Paste evenly over the Chicken Skin. Place the Chicken Breast side up on the Vegetables.
Place in the Refrigerator overnight.
Cover and cook on the "High" setting for 4 to 5 hours, or "Low" setting for 6 to 8 hours, or until the Chicken Breasts reach an internal temperature of 160º to 165º and Chicken Thighs reach 170º.