1. Bring a stockpot of water to a boil and salt it.
2. Put 2 tablespoons olive oil in a large skillet over medium-high heat. Put the ground beef in a medium bowl. Grate 1 1/2 cups Parmesan cheese and add 1 cup to the bowl. Chop 1/4 cup parsley leaves and add to the bowl.
3. Add 1/4 cup bread crumbs to the bowl, crack in the egg, and sprinkle with salt and pepper. Gently mix together until everything is just combined.
4. When the oil is hot, use 2 spoons to drop rounds of the meatball mixture into the skillet (without touching if you can help it).
5. Once you’ve used up all the mixture, let the meatballs cook, undisturbed, until they’re nicely browned on the bottom, 5 or 6 minutes. Trim, peel, and chop the onion; scatter it around the meatballs. Peel and mince 3 garlic cloves; scatter them on the onions.
6. When the meatballs are nicely browned on the bottom, add the tomatoes and their juice to the skillet, along with 3 bay leaves and a sprinkle of salt and pepper. Adjust the heat so the mixture bubbles gently, then cover the skillet (by the time the pasta is cooked, the meatballs will be firm).
7. When the water boils, add the pasta and stir occasionally. Start tasting after 5 minutes.
8. When the pasta is tender but not mushy, drain it, reserving some cooking water. Return the pasta to the pot. Discard the bay leaves and spoon about half of the tomato sauce into the pasta pot, leaving the meatballs behind. Toss the pasta, adding a splash of cooking water if you want to make it saucier.
9. Divide the pasta among 4 plates or bowls; top with the meatballs and the remaining sauce, sprinkle the remaining 1/2 cup Parmesan over the top, and serve.

— Recipe from How to Cook Everything Fast