In a large mixing bowl, combine cooked rice, diced chicken, frozen mixed vegetables, dairy-free cheese, dairy-free cream of mushroom soup, salt, and pepper.
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:
This casserole can be customized with your favorite vegetables or protein.