Preheat the oven to 350°F (175°C).
In a large bowl, combine shredded chicken, uncooked rice, cream of chicken soup, milk, and spices.
Stir in the mixed vegetables and 1 cup of shredded cheddar cheese until fully combined.
Transfer the mixture to a greased 9x13 inch baking dish, spreading it out evenly.
In a small bowl, combine breadcrumbs and olive oil, then sprinkle evenly over the casserole.
Bake in the preheated oven for 30-35 minutes, or until bubbly and golden brown on top.
Let the casserole rest for 5-10 minutes before serving.