I am always asked about where to eat in Rome, so after talking with a three star chef sous chef working in Rome, he recommends some corners for casual eating, or the three star La Pergola, a wine cellar with over 50,000 bottles, a water menu with 29 options.

Felice a Testaccio
http://www.feliceatestaccio.it

Romeo Chef and Baker
http://www.romeo.roma.it

Roscioli
http://www.salumeriaroscioli.com

La Pergola
http://www.romecavalieri.com/lapergola.php