I find the same, parents want healthy food, but kids dont really eat it. I serve less, if they arent eating it anyway they wont miss is if I only give them half, and just accept it. Do not lower your standards and start serving less nutritious food to cater to poor diet, and I personally dont like parents providing food, its never as healthy as I would serve, and it can cause issues between kids (Ive had one year old show up with poptarts and cookies for breakfast) cut down on what you searve and just accept that you will have waste