Prepare the Meatballs:Place ground meat in a large bowl.In a mini food processor, finely chop garlic, onion, parsley, and hot pepper (if using).Combine the chopped mixture with the meat, salt, and black pepper. Mix until just combined.Form into 12 meatballs and place on a baking tray. Brush with oil.

Bake at 375°F (190°C) for 30-40 minutes, until cooked through.

Make the Sauce:Heat olive oil in a wide pan over medium heat.Sauté chopped onion until edges are browned.Add sliced garlic and cook until golden.Stir in pasta sauce, oregano, cumin, granulated garlic, onion powder, dried parsley, brown sugar, crushed pepper, salt, and black pepper.Add baked meatballs and any juices from the baking tray.Pour in enough water to cover the meatballs. Bring to a boil, then reduce heat and simmer for 15-20 minutes.

Stir in torn basil leaves. Ensure the sauce remains slightly liquid to pour over spaghetti.

Cook the Spaghetti:Boil spaghetti according to package instructions.

Drain and stir in butter.