Preheat oven to 350°F.
In a large skillet, brown the ground beef over medium heat for 6 minutes or until fully cooked. Drain excess fat, if necessary.
In a large mixing bowl, combine the meat, uncooked rice, pinto beans, tomatoes (with juice), tomato sauce, taco seasoning, chicken broth, and corn. Mix well.
Pour the mixture into a greased 9x13 inch casserole dish. Spread it out evenly.
Cover the dish with aluminum foil and bake for 35 minutes, or until the rice is cooked and has absorbed most of the liquid.
Remove the foil, sprinkle the cheese on top, and return to the oven. Bake uncovered for an additional 5 minutes until the cheese is melted and bubbly.
Let casserole cool for 5 minutes. Top with avocado, cilantro, sour cream, onion, jalapeños, and lime wedges.