Fiddleheads are back in supermarkets here in Canada. We always have to stare at them in wonder, but we haven’t yet got round to trying them!!!
As we understand it, fiddleheads need to be washed well and then you cook them like asparagus although they do need to be cooked thoroughly as undercooked fiddleheads may cause an upset stomach.
Another reason we never get round to it is because the season is incredibly short. Perhaps next year!