What's cooking at 30,000 feet?

Browsing before boarding

AirlineMeals.net also takes you behind the scenes to find out where and how your in-flight meals are prepared.

(CNN) -- Airline passengers who've had a memorable meal on board an aircraft can now express their appreciation or dismay in a very public way.

There's an online gallery that shows just what people have been eating at 30,000 feet. If you are curious to know what the airlines will be feeding you after take-off, travelers from all over the world are taking pictures of food they've eaten on board an aircraft and posting them online at AirlineMeals.net.

Some people are still happy to dine in the sky but others aren't so sure.

"When I see some of the meals from domestic flights in Asia, sometimes I get scared of what I see in the meals," says webmaster Marco 't Hart.

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Serving satisfying in-flight meals can be tricky. On long haul flights, passengers will be sitting in an airplane for up to 16 hours -- and so will some of the food they consume.

Gebi Scherrer, an in-flight catering expert who managed food for airlines for more than 10 years, says it is difficult to control what happens to a meal once it leaves a catering facility on the ground. Eventually the food has to be reheated in the air and sometimes that leads to problems. "Either it's overheated, burned, or it's cold," says Scherrer.

Eat this!

A passenger submitted this picture of a meal from Gulf Air.

When the jet age was in its infancy, experts say airlines couldn't offer passengers much in terms of in-flight services; so the food, at least, had to be good.

"Today you have the TV in front of you; there are movies and so on," says Scherrer.

But perhaps a site like AirlineMeals.net can help make meals, once again, a central part of the in-flight experience. The airlines are already scrambling to showcase their finest fare.

"They said, 'Oh, the pictures you have from our [airline] don't look very good or they look outdated, and we want to contribute new photos,'" Hart says.

Hart is displaying corporate pictures of airlines' meals, but the site is primarily dedicated to photos that are submitted by passengers.