Preheat the oven to 350°F (175°C).
Prepare the sauce: In a large bowl, mix together the cream of chicken soup, sour cream, and taco seasoning. Stir in the chicken broth until smooth.
Combine ingredients: Add the shredded chicken, instant rice, ROTEL, corn, and black beans to the bowl. Mix everything until well combined.
Assemble the casserole: Transfer the mixture to a greased 9×13-inch baking dish and spread it evenly. Sprinkle the shredded cheese on top.
Bake: Cover with foil and bake for 40 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the casserole is bubbly and cooked through.
Serve & enjoy: Let it cool slightly before serving. Add your favorite toppings like chopped cilantro, crushed tortilla chips, or an extra dollop of sour cream.