TheFork users who ate in Latina have said really good things about Il Pacchero, Satricvm and Old Tom. Maybe you should give them a try!
Some of the more popular Creative restaurants that offer vegetarian options on their menu in Latina according to TheFork users include:
Il Pacchero, with a 9.2 rating
Old Tom, with a 8.7 rating
Bancoventisei, with a 8.5 rating