Opinion on best way to access one intranet page from the internet site

We have an onsite cafe and a daily lunch special.  Since we are in a remote area of town we allow the public to also dine here.  We have an internal .asp that makes a call to our MS SQL DB and pulls the daily menu.  Right now when the menu is updated it is scrapped and saved as an html file that is then task scheduled to FTP to the hosted internet site.

Problem is changes are made last minute, etc. so the menu on the internet site is not always current.

What would you suggest as to how to get access to that one .asp intranet page on the internet hosted site without having to open up unnecessary access to the intranet site.

Thanks.