Smothered Turkey Wings Recipe

Name: Smothered Turkey Wings Recipe
Ingredients: 1/4 cup plus 2 tablespoons (2 ounces; 55g) Diamond Crystal kosher salt; for table salt use half as much by volume or the same weight; 1 tablespoon (1/2 ounce; 15g) light brown sugar; 1 tablespoon whole black peppercorns; 2 bay leaves; 6 turkey wing flats or 3 whole turkey wings split into flats and drums (about 3 pounds/1.3kg total; see note); 1 shallot (3/4 ounce; 20g), cut in half; 5 sprigs fresh thyme; 1 large sprig fresh rosemary; 3 1/2 tablespoons (50ml) vegetable, canola, or other neutral oil, divided; 1 medium (8-ounce; 225g) yellow onion, thinly sliced; 1 large (5-ounce; 140g) carrot, peeled and thinly sliced crosswise into rounds; 1 celery rib (about 2 ounces; 55g), thinly sliced on the bias; 2 1/2 tablespoons all purpose flour; 2 1/2 cups homemade chicken stock or low-sodium broth, plus more if needed; 1 teaspoon dried sage powder; 1/2 teaspoon freshly ground black pepper; 1/2 teaspoon granulated garlic; 1/2 teaspoon onion powder; 1/4 teaspoon smoked paprika; Kosher salt