Almost four years ago I found Obika Mozzarella Bar, now known as Obika Prefetti, located at Via dei Prefetti, 26, Rome, Lazio 00186.
This was before the Obika empire spread world-wide. At the time that was their only site in Rome, but they had expansion plans already mapped out.
Back in 2008 they had one of the great deals in Roman restaurants. After 7 PM, as I recall, for the price of a drink, perhaps a 10-12 Euro glass of prosecco, you could have the equivalent of a full-meal. The appetizer table had a variety of mozzarella preparations, salads, and a dessert. No soup, but certainly salad.
Googling around I have not learned if that deal is still on the table. Does anyone know?