We are planning to attend a Sunday concert at Saint Chapelle at 20:00 (8:00 p.m.) and are interested in recommendations for dinner that are within a 15 minute walk or metro ride from Saint Chapelle and that are open at 18:00 (6:00 p.m.). While there are several restaurants near Saint Chapelle that i have found as being recommended through other searches, they either are not open on Sundays or do not open until 19:00 or 19:30 (7:00 or 7:30).
We would be fine with a very casual option as we could plan to have a nicer lunch that day.
Thanks in advance for any recommendations any of you might have.