Old-Fashioned Skillet Goulash

In very large skillet, cook ground beef and onion until meat is browned and onion is tender, stirring to break up meat. Drain well. Add soup, diced tomatoes with their liquid, vinegar, sugar, paprika, marjoram, salt, pepper, and water and cook for 8-10 minutes until mixture starts to boil, stirring frequently. Add pasta and bring back to a simmer. Simmer, uncovered, stirring frequently, until pasta is tender, about 12-18 minutes. Sprinkle with fresh parsley, if using, and serve.