At my children's elementary school there was a tradition of a Greek Olympics type of all-day event for the 6th graders, the culmination of months of study about ancient civilizations. They had all kinds of fun competitions: mathematics, games, physical contests, costumes (they wore togas), etc. It was a very big deal - a perk for being in their final year of elementary grades.
When my twin boys reached that milestone, I was on the festival's food committee. The other mothers and both teachers insisted on a "Greek" including tzatziki, something with lamb, rice with lemon and parsley, and I forget what all else. I said, "No way my boys will eat that." The other mothers were aghast at my children's limited palates and poor sense of culinary adventure. I was equally shocked at their 11 year old children's willingness to eat strange foods, but stood my ground. My position was that this day was supposed to be fun for the kids - why not give them foods they'll enjoy. I was outvoted by a landslide.
Parents paid in advance for their children's food, and could also buy meals for themselves if they were attending that day. I bought a meal for myself and said that just before lunch was being served I'd duck down the street to a nearby Carl's Junior for burgers & fries for my kids. Can't tell you the withering looks I got from the parents and teachers that day.
Long story a bit shortened: My kids were virtually the only ones who ate lunch. I've never seen so much wasted food. Kids wouldn't even touch the rice because it "had stuff in it."
My boys shared some of their lunches with their besties, but obviously I hadn't bought enough burgers & fries to feed 50 kids. Can't tell you how many mothers came up to me that day with regrets for not having rebelled along with me. My guess is that most of those kids (now early 30s) would happily eat somewhat unfamiliar food today. But at 11? No freaking way, Jose.
BTW, it wasn't the first or last time I fought the (school) law and the law didn't win.