Combine ground beef, bread crumbs, remaining oregano and garlic, parsley, eggs and cheese. Season with salt and pepper. Roll into 1 inch balls. Brown in a separate skillet over medium heat. Don't overcrowd the pan - may have to do in 2 batches. Add to sauce when browned.
Cook meatballs and sauce 30-40 minutes. Cook spaghetti until al dente; drain.