TheFork users who ate in Leucate have said really good things about L'Étage, Le Refuge Restaurant Italien and Le manuia. Maybe you should give them a try!
Some of the more popular Locally produced restaurants that offer local food options on their menu in Leucate according to TheFork users include:
L'Étage, with a 9.3 rating
Le Refuge Restaurant Italien, with a 9.3 rating
Le manuia, with a 9.3 rating