Cajun Butter Spatchcock Turkey

Name: Cajun Butter Spatchcock Turkey
Ingredients: 1 cup (2 sticks) unsalted butter, melted and cooled; 1/4 cup dry white wine; 1 stalk celery, cut into large pieces; 1/2 green bell pepper, cut into large pieces; 1/2 yellow onion, cut into large pieces; 4 heaping pinches Cajun seasoning, plus more for the skin; 5 tablespoons light brown sugar; 2 tablespoons hot sauce; 5 pinches kosher salt; One 10- to 12-pound turkey, thawed if frozen; 1/2 cup unsalted chicken stock