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You can do it in a frying pan, just have to keep moving it around....same as green coffee beans.....foil? don't know....

If you collect the roots and let them sundry first then roast, works pretty...

I have enjoyed the chicory coffee in the past......just be aware that there will not be a caffeine boost.

Haven't really tried dandelions, but they would be easier to find.....thanks for posting.