A few different things…
Tiny lettuce called “sucrette”, soft and sweet
Mayo as a rule has dijon mustard as an ingredient. Not overpowering but adds dimension
This is Moutard Ancienne, Ancient mustard. Loaded with unground mustard seeds, no French’s or Gouldens!
Bread that is not white is usually complete, rustic, or brown(mountain). This is mountain bread
Note the health score on the bread…. c’est normal, and keep the mfgs. Honest