I'm familiar with why water condenses on cool surfaces.
However, why does hot/warm food cause surfaces to sweat/condensate?
For example, if you put a warm (such as panini pressed) sandwich on a plate, then place the plate on the table that is cooler than the sandwich, water will collect in a liquid form under the plate/on the table.
What causes water to become liquid or to collect here? I would think that the heat would cause the water to evaporate...
Edit: Another way to perform this experiment yourself is with toasted bread or Pop-tarts. I have found the most success with a paper plate when using objects with a low specific heat. If you use food stuffs containing more water (with a higher specific heat) like lasagna and other pastas, the same effect can be achieved with stone, ceramic and glass plates.