The falafel, man. The falafel is some of the best I’ve ever had, and the staff is knowledgeable about food allergies and can accommodate.
While they don't have a gluten-free menu, they are accommodating and because of the simplicity of the ingredients in their dishes, can tell you what to eat. Sister cafe to Le Pichet. I always get a salad (the things they do with veg!) and/or the baked eggs/ham thing that comes in its own dish. I've also had omelets here. The only thing to watch out for is flying crumbs from any gluten baguette eaters at your table! (Low probability.) I've eaten here dozens of times and have never gotten sick.