On the matter of choice. When my children, then in early years of primary in Wales from 4 to 8 in one case (plus being a bit backward because she is Down) and 4 to 7 in the other, bearing in mind both have end of school year birthdays that put them in first year so young, they had multi-choice meals. However, it was set up so that the choices were on display and they then asked whether they wanted x amount. They were allowed to mix to a point. It was a three course meal, usually three choices each course, which means some calculation. Then there was the choice of drinks, all juices/squashes or nothing because water was always on the table.
As a school governor I was occasionally obliged to make an appearance as a lunch guest and saw how well the children coped. By the end of the first year they became quick and efficient. Children with diets, there were health diets, Hindu vegetarians, Moslem halal, and other special needs they had a separate area where they were served but then joined the other children. The school canteen was a pleasure place to be in. Some of the food was typically Welsh and a bit bland, but none of it was overcooked or served without care and attention.
Now at 9 and 11 respectively their school food is just a very ordinary standardised portion, irrespective of 6 or 11 years old, without choice and any kind of food statement.
I have seen children worldwide make choices, many far more difficult than choosing food, from very low ages. I also know just how good children are at decision making sharing, including with adults, and have enough publications on the topic to my credit to wish to see much, much more of it in France than they extend to children. If it begins with food and just being able to share some of the planning of menus then that is an enormous and praiseworthy step forward. The doctrinal approach of children 'must eat' and especially the slavish belief in them needing to have animal proteins in every meal is demeaning to children who are supposedly learning many thing including management of their own lives, thus choices. Is anybody surprised that after the USA France has the biggest number of MacDonald franchises and that the country with a reputation for cuisine has second biggest per capita consumption of 'take away' foods such as McDo, pizzas, etc in Europe, catching up with the UK fast at that!