We always bring our food for flights...healthier, tastier, AND less expensive. Usually a breakfast and a lunch.
You can have hard boiled eggs, cheese, veggie sticks, sandwhiches, wraps, etc.
Coming back we get Zee Best sandwhiches, and a pizza from our favorite on-island place. If the pizza has meat, it must be consumed prior to US. Learned the hard way about prosciutto and artichoke pizza....lol.