Screen mirroring Nexus 7 2012 to HDTV?


Hi, I have owned a Nexus 7 2012 tablet for awhile now, and I wanna connect this little guy to an HDMI port on a TV.. but how??

I like to play games, and was hoping to screen mirror the gameplay somehow, with the screen turned off? I read some things about possibly streaming the screen over wifi, but I feel like there might be some lag involved with this..? I wish i could find a way to get the screen onto an HDTV. Please help~! :p