In a large mixing bowl, combine the cooked chicken, frozen mixed vegetables, cream of mushroom soup, shredded cheddar cheese, and cooked rice. Mix well.
Transfer the mixture to a baking dish and spread it out evenly.
Bake in the preheated oven for 45 minutes, or until the top is golden and bubbly.
Let it cool for a few minutes before serving. Enjoy!
Notes:
Feel free to substitute the chicken with turkey or beef. You can also use fresh vegetables instead of frozen ones.