I am very familiar with school breakfasts and lunches as I have three teachers in my family and I have worked in schools.
What bothers me most is that in our zeal to provide healthy meals we remove all taste (no butter, no salt, no sugar etc.). Most of the children in the schools where my family teach are living at poverty level or very near. They are hungry but still do not eat the food because some of it is downright gross. I have tasted a lot of it so I know firsthand. I would rather they eat a little fat or sugar than refuse the food and not eat at all.