Slice beef into very thin strips.
Cook beef in nonstick skillet until browned, stirring often. Remove beef.
Add soup, broth, water and onion. Heat to a boil. Stir in noodles. Cook over low heat 10 minutes or until noodles are done, stirring often. Stir in yogurt. Return beef to skillet and heat through. Garnish with parsley.
Tip: To make slicing easier, freeze beef 1 hour.
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