Sending Mail to Multiple Addresses

I am thinking of moving from Outlook to Mail as it works better with the iCloud but cannot figure out how to do one thing...

In Outlook I can bring up the contact list and click on various email addresses to send a mutliple email out.

How do I do the same thing in Mail. I dont want to create a Group as sometimes this operation is for one off emails?

Can anyone shed some light on this for me please? What am I missing?

Thanks!