Browse through real-life photos of airplane meals taken by the folks that have eaten them on AirlineMeals.net.
absolutely gross appetizing your cuisine will look. AirlineMeals.net lists hundred of photos that you can search based on the airline, meal, and route.
Personally I like looking at what the crew meals have to offer (not much better) and how the food is prepared behind the scenes. Although I don’t think plane food is all that bad, you should always bring some cheap eats, snacks, and spices so you have healthy options at your disposal.