Mustache (PHP) Outputting associative array keys

In Mustache can I print out the name of an associative array key instead of its value?

i.e. So instead of this:

$cars= array(
  'name'=>'ferrari', 'color'=>'red', 
  'name'=>'lambo', 'color'=>'yellow'
);
....
{{#cars}}
    {{name}} is {{color}}
{{/cars}}

I would prefer to have a data source with a smaller footprint:

$cars= array('ferrari'=>'red', 'lambo'=>'yellow');
....
{{#cars}}
    {{array_key_here}} is {{.}}
{{/cars}}

Is it possible?