Heat a large pan over medium. Add a splash of oil, toss in the chopped onion and garlic, and cook until soft and fragrant.
Add the minced beef and break it up as it browns. Keep it moving until there’s no pink left in sight.
Pour in the canned tomatoes. Stir, season generously with salt and pepper, and let it bubble for about 20 minutes.
Meanwhile, cook the spaghetti according to the package directions. Aim for al dente unless you're into mush.
Drain the pasta. Serve it up with the meat sauce ladled on top.
Finish with a snowfall of grated parmesan. Serve hot, eat fast.