One thing to note, actually cooking something requires an application of heat over time. Instantaneous heat transfer will not cook, it will usually just burn.

Some people say you can use a nuke to cook a pizza if you put it in the right spot, but the same problem would apply.

Related, some guy did actually slap a chicken into being cooked. It was predictably disgusting:

www.youtube.com/watch?v=LHFhnnTWMgI