1. Combine ground beef, bread crumbs, eggs and 1/2 cup sauce in medium bowl; shape into 18 meatballs.
2. Bring remaining sauce to a boil over medium-high heat in 12-inch skillet. Gently stir in uncooked meatballs. Reduce heat to low and simmer covered, stirring occasionally, 20 minutes or until meatballs are done.
3. Serve over hot spaghetti.