01 - Heat olive oil in a large pot or Dutch oven over medium heat. Add the finely chopped onion and cook until softened, about 3 to 4 minutes. Add the minced garlic and sauté for 30 seconds until fragrant.
02 - Add the ground beef to the pot. Cook, breaking it apart with a wooden spoon, until browned and no longer pink throughout, about 6 to 7 minutes. Drain any excess fat if desired.
03 - Stir in the tomato paste, dried oregano, ground cinnamon (if using), bay leaf, salt, and pepper. Cook for 1 minute, stirring constantly to allow the spices to release their aromas.
04 - Pour in the crushed tomatoes, broth, and water. Bring the mixture to a boil, then reduce the heat and let it simmer gently for 10 minutes so the flavors meld together.
05 - Stir in the orzo pasta. Cover the pot and simmer gently, stirring occasionally to prevent sticking, until the orzo is tender and most of the liquid has been absorbed, about 15 minutes. Add more warm water if needed to reach your preferred consistency.
06 - Remove and discard the bay leaf. Taste the dish and adjust seasoning with salt and pepper as needed. Serve hot, garnished with grated cheese and a sprinkle of fresh chopped parsley.