2Add the orzo, meatballs, chicken broth, heavy cream, diced tomatoes, sun-dried tomatoes, garlic, spinach, seasonings, and 1/2 cup Parmesan to a greased 9-by-13-inch baking dish and stir everything together, ensuring the orzo is submerged.
3Cover tightly with foil and bake.
4Give everything a good stir, then top with mozzarella and plenty of freshly grated Parmesan.
5Broil until the cheese is melted, bubbling, and golden.
6Let it rest for 5–10 minutes, finish with fresh basil, and serve.