TheFork users who ate in Magny-le-Hongre have said really good things about La Table du Curé, Le Cercle and Omakase by Goma. Maybe you should give them a try!
Some of the more popular Vegan restaurants that offer vegetarian options on their menu in Magny-le-Hongre according to TheFork users include:
Kinnaree Thaï, with a 9.1 rating
Kitchen Kulture, with a 8.2 rating
Bistrot 51, with a 8.9 rating