Saucy Spaghetti and Meatballs Is the Cozy Dinner That Wins with the Entire Family

Name: Saucy Spaghetti and Meatballs Is the Cozy Dinner That Wins with the Entire Family
Ingredients: 1 small yellow onion; 2 cloves garlic; 1/4 cup fresh parsley leaves or 4 teaspoons dried parsley leaves, plus more for serving if using fresh (optional); 2 large eggs; 2 1/2 pounds lean ground beef; 2 ounces grated Parmesan cheese (about 1/2 cup), plus more for serving; 1/2 cups dried panko breadcrumbs; 1 tablespoon kosher salt, plus more for the pasta water; 2 (24-ounce) jars Prego® Traditional Italian Sauce , divided; 1 pound dry spaghetti