Display App Results in a new Tab

I have built an organization app that makes a call to an external system, which returns query results for that particular org.  Because of the size limitations of the org sidebar, I have to display my data like this:

Item 1

  Field A - value

  Field B - value

  Field C - value…

An org could have many items, so the users have to scroll through each of the items to find what they are looking for.

The request has been made to see if I can return the data in a table format, such as this:

               Field A     Field B     Field C     Field D…

Item 1   value        value        value       value…

Item 2  value        value        value       value…

… and so on.

Because this information is for display only (no links are needed to any other data), I thought it would be nice if I could pull the external data from my app and then build a completely new HTML page.  Is that even possible?  Can anyone nudge me in the right direction on how to do this?  Or, is there an easier way to display external data in the format requested?

Thanks.