In a large bowl, combine the ground meat, breadcrumbs, egg, minced garlic, grated Parmesan cheese, salt, and pepper. Mix well until a uniform mixture forms.
Shape the meat mixture into small, walnut-sized meatballs.
Heat 2 tablespoons of olive oil in a large skillet over medium heat. Brown the meatballs on all sides until golden brown, about 8-10 minutes.
Pour the tomato sauce into the skillet with the meatballs, and add a pinch of sugar. Reduce the heat to low, cover, and simmer for 15-20 minutes, or until the sauce has slightly thickened and the flavors have melded.
Meanwhile, bring a large pot of salted water to a boil. Cook the spaghetti according to package directions until al dente. Drain well.
To serve, place the spaghetti on a plate, top with the meatballs in tomato sauce, and garnish with chopped fresh parsley. Sprinkle with grated Parmesan cheese, if desired.
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