global tags feed in a widget (like global posts) maybe edit global posts widget

I would like posts only with a specific tag to stream down the main page showing in the same form (with avatar) as the Global Posts Widget. I have my Global Tags Feed working perfectly- its just that bare RSS is rough looking and the Global Posts Widget displays the feed with avatar and author beautifully.

I was thinking the easiest way would be to edit the global posts widget to make it pull its feed from the Global Tags Feed. How can I do this?

Thanks so much guys! I value your site and your support greatly.