This restaurant in Frankfurt is highly recommended, especially if you are celiac or cannot consume gluten. It is a fairly inclusive place in this regard.
In my case, I ordered a cheeseburger with vegan cheese and gluten-free bread. Although the bread was small, everything was delicious. As for the potatoes, we found them quite expensive: €5 per portion. They're not the best, but they're still delicious. I recommend sharing a portion or ordering the loaded fries, which come with cheese or chili and are ideal for sharing.
The service was excellent. They treated us very well and, despite not having a reservation, they gave us a table without any problem. We didn't order dessert because, as far as I saw, there were no gluten-free options. I didn't ask, since I didn't see any indicators about it.
Overall, I recommend it. The price is good, the quality too, and I would definitely go back.