the emphasis is not on keeping up with fashionable ideas in more prosperous countries
It's not about fashionable ideas Maf, it's about education. School is not just about 'book learning' and for kids from poorer homes, it's even more important that school gives them a broad education although actually even children from prosperous families often eat quite unhealthily too for other reasons. Kids in Polish schools are taught about the food pyramid (not sure about primary schools but certainly in secondary schools) but schools need to practise what they're preaching.
How does the menu compare to such menus in the UK and Ireland then?
There are no school dinners in Ireland. Children bring their own packed lunches and they have to fit the school's 'healthy eating' policy. In schools with a designated 'disadvantaged' status, lunches are provided. I spent years teaching such schools so I can tell you the menu for primary school. Such schools also often have a breakfast club to ensure that kids get brekkie because so many parents can't get themselves together to give the child even a bowl of cornflakes. I've posted a menu below.
in Poland - why is the lunch break hurried so much, especially for younger children?
Again Delph, it's a lack of understanding of the broadness of education. School is as much about developing social skills and life skills as it is about academics. Meals and eating, table manners, holding a conversation, passing the dishes around, tidying up after, these are all important parts of a child's general education and increasingly children are not getting that. Even in prosperous homes many kids rarely sit down to a meal with their whole family because of conflicting schedules, parents working long hours etc.
@ Kaprys, here's the menu from the company that provided lunches for the last school I taught in, in Dublin. They were actually really tasty and if there were any left over because a kid was absent, they were happily wolfed down by many a hungry teacher! At the beginning of each term the parents were asked to fill in their menu choice for each day for their child and then the kid could change their preferences next term if they wanted. Kids who were fed up of their choice during term used to swap with each other so it worked out fine.