Reporters Lenny Bernstein and Lauren Weber bring us the backstory of how ultra-processed foods ended up on lunch trays, amid growing concerns about child nutrition.

She captures brown paper bags, cafeteria trays, and personal accounts — including a mother packing the same lunch for six years … and selling a cute brother's picture in the cafeteria to buy junk food ...

Kids won't eat what they don't like. More students – many of whom rely on school meals as their main or only source of nutrition and calories – are likely to toss their lunch trays.