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Probably is late for a post about chestnuts, but it`s good to know.
You can cook them simply in a pan in your kitchen.
Wash the chestnut and do a cut on them, place chestnuts in a pan and let them cook at medium fire for 1 hour or 45 mins (this depends on how big are your chestnuts). Move them every then minutes and when you see they are almost done (darker), place a wet tissue on them and close the pan. Let the water of the fabric evaporate and then you`re ready to open and eat hot chestnuts.
Picture is mine.