---- In the MyApp.pm ----
$self->renderer->add_handler('rss' => sub {
				my ($renderer, $c, $output, $options) = @_;
				delete $options->{encoding};
				$self->app->log->debug('GOT THERE');
				$$output = 'GOT THERE!';
				return 1;
				}
	);

---- In use in the application ----
$self->render( 'format' => 'rss');