Preheat oven to 375°F (190°F). Grease a 9 x 13-inch baking dish or spray with nonstick cooking spray.
Add chicken broth, barbecue sauce, pickle brine, oregano, seasoned salt, onion powder, garlic powder, and black pepper to the prepared dish. Whisk until completely combined.
Stir in uncooked rice, carrots, pork, and ½ cup of the grated cheese.
Cover tightly with foil and bake for 55-60 minutes, or until the liquid is absorbed and the rice is tender. Use a fork to fluff the rice, and taste to make sure that the rice is tender. Season with salt and pepper, if desired. Sprinkle the top of the casserole with the remaining grated cheese. Place the dish under the broiler for a couple of minutes, just until the cheese melts.
Garnish with chopped fresh herbs and pickled red onions, if desired, and serve!