Someone who worked for a ground crew at a private airport shared that food waste is enormous and happens frequently. Apparently, any uneaten food on a plane that flew in from another country must be incinerated immediately as it is considered international waste. Including the food on flights that never took off, like private planes that are delayed. Unfortunately, this continues a massive cycle of perpetual food waste. But the crew might have another secret about what they do with the food.
Although the food is supposed to be incinerated, sometimes the food is given to the crew, and they get to eat it. However, it remains on the down low.