How To Eat CLEAN On A Cruise. You don’t have to give up on your diet while you are on a cruise vacation! We show you around the Windjammer on Royal Caribbean ‘s Freedom of the Seas and teach you how to make balanced meals from the cruise food. If you would like us to make more videos on healthy eating tips for when you are on vacation or a cruise, let us know! We would be happy to break down macros and share the importance and reasoning behind it all!