Slow Roasted Pork Jambalaya

Name: Slow-Roasted Pork Jambalaya
Ingredients: 1 (4-to 5-pound) piece bone-in pork butt; Kosher salt; Freshly ground black pepper; 4 cups water; 2 tablespoons rendered pork fat or unsalted butter; 12 ounces Andouille sausage or kielbasa, sliced; 2 medium onions, chopped; 2 green bell peppers, chopped; 4 celery stalks, chopped; 6 garlic cloves, finely chopped; 2 bay leaves; 1/4 teaspoon cayenne pepper; 1 (32 ounce) can tomatoes in juice; 1 cup long grain white rice; 2 tablespoons flat-leaf parsley leaves