Great question — answering as the UphillTech team:
Panko won't stick to chicken (too dry), but will stick to egg. Egg won't stick to chicken (too smooth and non-absorbant), but will stick to flour. Flour will stick to chicken. Dredge first through flour, then through (well beaten) egg, then through panko. It's a tricky combination, but if you do it right the results are excellent. Any dry spices you want to put in can go in the flour. While I don't know for sure, I would certainly wouldn't include any oils in the coating, as none of flour/egg/panko will stick to oils.
Full answer by Dave Griffith: https://cooking.stackexchange.com/a/16844 (CC BY-SA 3.0).
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