TheFork users who ate in La Grande-Motte have said really good things about L'Essentiel by La Plage, Le Cocobaïa Club and Au Petit Bonheur. Maybe you should give them a try!
Some of the more popular Vegan restaurants that offer vegan options on their menu in La Grande-Motte according to TheFork users include:
L'Essentiel by La Plage, with a 9.3 rating
Le Cocobaïa Club, with a 7.5 rating
Au Petit Bonheur, with a 8.7 rating