Braised Bacon Carolina Rice

Name: Braised Bacon Carolina Rice
Ingredients: 1 (1/2-pound) piece slab bacon, cut crosswise into 1/4-inch-thick pieces; 1 1/4 cups finely chopped onion; 2/3 cup finely chopped celery; 2 garlic cloves, minced; 1/2 teaspoon dry mustard; 1/4 teaspoon cayenne; 1/4 teaspoon hot smoked paprika (piment&ocute;n picante); 4 cups chicken stock or reduced-sodium chicken broth; 1/2 cup tomato juice; 1 cup long-grain white rice (preferably Carolina Gold); 2 tablespoons chopped celery leaves; 2 tablespoons unsalted butter; 1/2 teaspoon kosher salt