Step 1 Combine mince, onion, breadcrumbs, half the basil and parmesan in a large bowl. Roll tablespoons of mixture into balls (there should be about 32 balls) and place onto a large plate. Cover and refrigerate mixture until required.
Step 2 Bring tomato sauce and 1 cup water to the boil in a large, deep saucepan. Add meatballs and cook, shaking pan occasionally, for 15-20 minutes or until meatballs are cooked through.
Step 3 Meanwhile, cook pasta in a large saucepan of boiling water following packet directions. Spoon pasta onto 4 serving plates. Top with meatballs and sauce. Sprinkle with remaining basil. Serve with salad.