This chicken and wild rice casserole is a comforting and hearty dish that is perfect for chilly nights. The chicken is cooked with onions, celery, and carrots, then mixed with wild rice and a creamy sauce made with chicken broth and heavy cream. The casserole is then baked until bubbly and golden brown. This dish is a great option for meal prep, as it can be made ahead of time and reheated throughout the week.