Cajun Spiced Roasted Turkey

Name: Cajun-Spiced Roasted Turkey
Ingredients: For the Cajun & Herb Compound Butter:; 8 tablespoons unsalted butter, room temperature; 1 teaspoon smoked paprika; 1 teaspoon onion powder; 1 teaspoon ground black pepper; 1/2 teaspoon cayenne pepper; 2 teaspoons kosher salt; 2 sprigs cilantro, de-stemmed and roughly chopped; 2 sprigs flat-leaf parsley, roughly chopped; For the turkey:; 3 large carrots, halved crosswise and cut into 2-inch pieces; 2 large red onions, cut into ¼-inch-thick wedges; 2 green bell peppers, de-seeded and quartered; 2 stalks celery, halved lengthwise and cut into 2-inch pieces; 6 garlic cloves, peeled and smashed; 2 sprigs rosemary; 1 sprig fresh thyme; 2 sprigs fresh sage; 1 bay leaf; 4 teaspoons kosher salt, plus more to taste; Freshly cracked black pepper, plus more to taste; 8 to 10 pound turkey, fresh or frozen (fully thawed); 2 cups chicken stock of your choice (beef or vegetable also works!)