Sous Vide Turkey Breast With Crispy Skin

Name: Sous Vide Turkey Breast With Crispy Skin
Prep time: 15 min
Cook time: 2 h 45 min
Total time: 3 h
Cuisine: American
Ingredients: 1 large whole skin-on, bone-in turkey breast (about 5 pounds; 2.2kg); Kosher salt and freshly ground black pepper; 1 tablespoon (15ml) vegetable oil; 1 large onion, roughly chopped; 1 large carrot, peeled and roughly chopped; 2 ribs celery, roughly chopped; 1 1/2 quarts (1.4L) homemade or store-bought low-sodium chicken stock; 2 bay leaves; 1 teaspoon (5ml) soy sauce; 3 tablespoons (45g) unsalted butter; 1/4 cup (40g) all-purpose flour