You just need to set the KeepRoot option: 
print xml_out($req, KeepRoot => 1);

[download]
produces 
<Foo Bar="1">
  <Baz>2</Baz>
</Foo>

[download]

In reply to Re: <opt>-less XML::Simple by Anonymous Monk
in thread <opt>-less XML::Simple by dsheroh

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