In a 12 inch skillet add spaghetti, water, onion, one tablespoon of granulated garlic and 1 ½ teaspoons salt together and cook noodles until al dente over medium heat.
Once the spaghetti has fully cooked, remove one cup of the pasta water and set aside. Drain the remaining water.
Return the spaghetti to the skillet and add all the remaining ingredients, including the reserved pasta water, granulated garlic, and salt.
Stir well, add the meatballs, and cook on medium low until well combined and the meatballs are heated through.
Top with optional grated extra Parmesan cheese and parsley or basil.
Notes
Reserve the pasta water. Scoop out a cup of the starchy water before draining and stir it back in to loosen and gloss the sauce.
Stir frequently. This is not a set-it-and-forget-it dish. Move the noodles often, especially early on, so they cook evenly and do not stick to the bottom.
Keep it at medium. Higher heat boils over and turns the pasta gummy.
Serving math. Figure 4 hearty servings or 6 to 8 modest ones, with 2 to 3 meatballs per person.