CakePHP 3.0 (Send html email without template)

Hello,

 I'm trying to send an html email without template, but the variables it´s not working.

$email = new Email('default');
$email->emailFormat('html')
    ->to($toAddress)
    ->subject('Test')
    ->viewVars(['value' => '12345'])
    ->send('<p>Here is your value: <b><?= $value ?></b></p>');

   

I'm doing something wrong?

Thank you,
Rodrigo

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