Beef Stroganoff

1 pound ground beef
2 cups water
1/2 cup Nearly Hamburger Helper Mix
2 cups uncooked egg noodles
1/2 cup sour cream
1 jar mushrooms, optional

Brown and drain ground beef. Add all ingredients, except sour cream. Cover
and simmer 20 minutes or until noodles are tender. Stir in sour cream, heat
and serve.