Quick and simple, this requires overflow servers during high periods like the other 'quick' farm methods this was the best place I found for Chef without any hostile mobs nearby.
Human starting area -> Queensdale -> Beetletun Farms -> Northern field
http://dl.dropbox.com/u/78934569/farm.png
Always 8 herbs to gather, logout, login and hope for a fresh server.
Times to gather varies depending on class/active boons you can provide.
I put it here, but is more of a guide really feel free to move it if need be.
Edit: Found another spot for Potatoes all clumped up without the need for much running around.
http://dl.dropbox.com/u/78934569/gw018.jpg
Plains of Ashford <Charr 1-15 area> Bottom right corner -> Loreclaw Expanse near cliff face.