Rinse the fiddleheads, remove any papery brown skin from the tops, and then slice off as much of the brown parts on their ends as you can. Fill a large bowl with cold water and put the fiddleheads in there for a few minutes, swishing them around with your hands to remove any dirt. * I rub the coils to loosen any dirt as well. Discard the water and repeat this process
Add fiddleheads to a pot of cold water.
Bring to a boil and boil for at least 10 minutes, but not longer than 15 minutes.