Combine all ingredients together in a bowl or food processor. Thoroughly mix ingredients together.
Pat dry both sides of spatchcocked chicken.
Gently use hands to pull the skin away from chicken.
Liberally stuff butter mixture in between skin and chicken. Rub the remainder of the mixture on chicken skin.
Place chicken on a heavy-duty or cast iron pan.
Place chicken in a preheated Bull Grill on medium heat (350 degrees). Cook until the breast has reached an internal temp of 165 degrees.
Let rest for 15 minutes before carving.