It looks like AF is trialing a new economy snack concept on some medium haul routes these days.
according to a FB post, a passenger, on AF1185 from Tunis to CDG in Economy on Sunday 23 Nov, has received an email informing him/her about a new catering trial.
Passengers will receive a box with 3 mini sandwiches, a pastry as well as something sweet with tea or coffee.
The email doesn’t say it will be a paid option so it looks like it will be free…
This is a departure from BoB trials that haven’t restarted.

Edited: new concept explained in the next replies.