The Best Tandoori Turkey

Name: The Best Tandoori Turkey
Ingredients: 3 tablespoons vegetable oil; 2 tablespoons chickpea flour (besan); 2 to 3 shallots, coarsely chopped; One 4-inch piece gingerroot, peeled and coarsely chopped; 8 medium cloves garlic; 2 to 3 green Thai chiles or 1 to 2 serrano chiles, coarsely chopped; 1 cup plain Greek yogurt; 6 tablespoons unsalted butter, melted; 3 tablespoons fresh lemon juice; 2 tablespoons distilled white vinegar; 1/4 cup tandoori masala; 1 tablespoon paprika; 1 teaspoon ground turmeric; 1/2 teaspoon garam masala; 1 tablespoon kosher salt; 1/2 teaspoon black pepper; One 12- to 14-pound turkey