Start by grabbing a large mixing bowl to combine your base ingredients. Add the ground beef, breadcrumbs, egg, minced garlic, and half of the parmesan cheese into the bowl. Gently mix everything together with your hands until just combined, being careful not to overwork the meat or it will become tough.
Take small portions of the meat mixture and roll them between your palms. Aim for meatballs that are roughly 1-inch in diameter so they cook evenly and are easy to eat in one bite. Heat your Dutch oven over medium-high heat and brown the meatballs on all sides until they develop a nice crust, though they don't need to be fully cooked yet.
Once the meatballs are browned, you can build the rest of the dish in the same pot. Pour in the tomato basil sauce and the dry orzo pasta, stirring gently to ensure the pasta is submerged in the liquid. Reduce the heat to a simmer and let it cook for about 12 to 15 minutes, or until the orzo is tender and the sauce has thickened beautifully.
The final step is all about adding that irresistible cheesy finish. Turn off the heat and sprinkle the remaining fresh parmesan cheese over the top of the hot pasta and meatballs. Let it sit for a minute so the cheese melts slightly, then give it a final stir before serving it up warm.