Preheat the Oven: Preheat your oven to 350°F (175°C).
Make the Casserole Base: In a large bowl, add cream of mushroom soup, cream of chicken soup, sour cream, taco seasoning and chicken stock and combine.
Add the Main Ingredients: Add and fold in the shredded rotisserie chicken, parboiled rice, Rotel (with juices), corn, and black beans. Mix everything well to evenly distribute the ingredients. Transfer to Baking Dish & Top with Cheese
Pour the mixture into a 9x13-inch casserole dish and spread it out evenly. Sprinkle the shredded cheese evenly over the top.
Bake the Casserole: Cover the dish with aluminum foil and bake for 25 minutes. Then, remove the foil and bake for another 5 minutes until the cheese is melted.
Serve: Take the casserole out of the oven and let it rest for 3-4 minutes. Serve it as is or top with chopped cilantro, shredded lettuce, chopped tomatoes, and a dollop of sour cream. Enjoy!
Notes
Refrigerator Storage: After cooling completely, transfer the leftover casserole to an airtight container. Store it in the refrigerator for up to 4 days. I recommend portioning it into individual containers for easy reheating during busy weeknights.Freezer Storage: This easy casserole freezes exceptionally well. Portion and place it into freezer-safe containers, then freeze it for up to 3 months.Reheating from Refrigerated: Microwave individual portions on medium power for about 2 minutes. Adding a tablespoon of water or chicken broth before reheating will help the casserole maintain moisture.Reheating from Frozen: Thaw the casserole overnight in the refrigerator. If you're reheating it from frozen, I recommend using an oven at 325°F. Cover it with aluminum foil and heat for 30-45 minutes until the center reaches 165°F.