01 -
Preheat the oven to 350°F. Grease a 9x13-inch baking dish with butter or nonstick spray.
02 -
Season diced chicken with Italian seasoning, salt, and black pepper. Melt 2 tablespoons butter in a large pot over medium heat. Add chicken and cook undisturbed for 2-3 minutes until well browned, then flip and cook through. Remove chicken and set aside. If using rotisserie chicken, dice and skip this step.
03 -
In the same pot, combine chicken broth, olive oil, and uncooked rice, scraping up browned bits. Bring to a boil, reduce to low heat, cover, and simmer for 6 minutes. Add broccoli florets evenly on top, cover again, and cook for an additional 9 minutes or until rice is tender. If needed, add a splash more broth and cook an additional 5 minutes. Remove from heat and let rest, covered, for 10 minutes.
04 -
Gently stir the cooked chicken, cream of chicken soup, milk, sour cream, garlic powder, dried thyme (if using), and half of the shredded cheddar into the rice and broccoli mixture. Adjust salt and pepper to taste.
05 -
Transfer the mixture into the prepared baking dish. Spread the remaining cheddar cheese evenly over the top. Cover with foil and bake on the center rack for 15 minutes until cheese is melted and bubbling.
06 -
While baking, crush Ritz crackers into coarse crumbs. Melt 2 tablespoons butter and toss with the cracker crumbs until evenly coated.
07 -
Remove foil from the casserole, sprinkle the buttered cracker crumbs evenly over the surface. Return to the oven uncovered and bake for 10 more minutes until the topping is golden and crispy.
08 -
Allow the casserole to rest for 5 minutes before serving to set and ensure clean slices.