Preheat the oven to 425°F. Line a baking sheet with parchment paper. Remove the giblets from the chicken, pat it dry with paper towels, and set aside.
In a small bowl, mix the salt, pepper, garlic powder, onion powder, and paprika, then set aside.
HOW TO Spatchcock The Chicken...Using kitchen shears, cut from the tail up to the neck along one side of the backbone. Repeat on the other side to fully remove the backbone. Flip the chicken over so the breast is facing up. Place both hands on the breastbone and press down firmly until you hear a crack. This breaks the breastbone so the chicken lays flat. Tuck the wing tips behind the breasts so they don’t burn. Place the chicken in the center of the baking sheet. Add the fresh rosemary, thyme, and sage to the melted butter, then brush it all over the chicken, including under and over the skin.
Season the chicken all over and underneath the skin with the spice mixture.
Slice the sweet potatoes in half lengthwise, drizzle with olive oil, and season with salt to taste. Place them cut-side down on the baking sheet next to the chicken.
Cook for 50–55 minutes, or until the chicken reaches an internal temperature of 165°F. Let it rest for 10 minutes before slicing and enjoy!