If you want to eat a better meal on your next long-haul flight, request a vegetarian (or kosher) meal when you book your tickets.
In addition to being fresher, the vegetarian and kosher meals on airlines — which are often the same — are often tastier than their meat-based meals. In addition, on U.S.-based flights, the meals often are less mixed together, making them easier to dissect/remove parts that don’t appeal to you.