This Chicken Broccoli Rice Casserole is a comforting, creamy baked dish that combines tender seasoned chicken thighs, fresh broccoli florets, and fluffy white rice in a rich cheese sauce made with cream of chicken soup, heavy cream, Boursin cheese, sour cream, and sharp cheddar. Perfect for a hearty family meal, it offers a delicious balance of flavors and textures topped with melted cheddar cheese and baked to golden perfection.