Could Chimpanzees Learn to Cook

I was intrigued to see an article on the BBC web site under the title Cooking skills may have emerged millions of years ago with a link to the original paper Cognitive capacities for cooking in Chimpanzees (unfortunately behind a pay wall). The subject raises an interesting question - as a more primitive action to cooking related to storing food for use later, or processing it in some way. I am wondering what the first archaeological evidence for such activities. For instance, when did the preparation of dried food - either fruit, meat (biltong) and fish really begin?  Does anyone know?