Nothing wrong with a fried egg! Nothing wrong with oil! Eggs don't absorb oil so it's one of the best ways to cook them.
I thought we had moved away from the idea that a low fat diet is the healthiest?
Why can't we just feed children a diet full of unprocessed home-cooked food?
In the 70s and 80s we ate pudding every day at school and after tea at home as well and it didn't make us overweight. It was home-made so not ultra-processed. We didn't snack between meals because we had, had our sweet treat with our meal. We were only allowed sweets or crisps on Friday after school when we got our pocket money. There wasn't any processed snacks in the cupboards at home- there was fruit or bread if we were hungry after school and milk to drink.
The way many children eat at home now is completely wrong, that is the problem, not school dinners.
The school I work in supplies healthy school meals and children won't eat them! They want plain pasta, chips, sausages, chicken nuggets, etc as opposed to the vegetable lasagne, carrots and broccoli, roast dinners etc. that they are offered.
Most bring a packed lunch containing crisps, chocolate biscuits and sugary processed yoghurts instead. Their parents pack them far too much for their age- there is a fear of children being hungry these days so when children shun fruit and vegetables like young children naturally do they are not encouraged to eat them, they are replaced with things parents are confident their children will eat. These are inevitably bland, starchy and processed foods, so children never learn to like fruit and veg or foods with diverse textures and flavours so we are ending up with a generation of children with limited diets.