1Preheat oven to 350°F. Lightly grease a 9×13-inch baking dish with olive oil to prevent sticking.
2In a large bowl, combine the cooked rice, shredded chicken, broccoli florets, diced tomatoes, garlic powder, Italian seasoning, chicken broth, and cream/sour cream. Stir everything together until well combined.
3Add Cheese: Fold in half of the shredded mozzarella cheese, and season with salt and pepper to your liking.
4Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
5Sprinkle the remaining mozzarella cheese on top, ensuring a cheesy crust once baked.
6Bake: Place the dish in the preheated oven and bake for about 30-40 minutes, or until bubbly and golden.