Take a slice of thick salmon and make an incision upon each side,
cutting it to the bone, put plenty of salt and chopped onions upon it
and rub it well in, then oil a sheet of white paper, lay the salmon on
it, fold the paper over and crimp it at the edges to keep the steam from
escaping, put it on a gridiron over a slow fire, and when done serve it
in the paper with pats of butter separate; the person that serves this
dish at table should open the paper and place two pats of butter on each
slice; it requires to be eaten very hot.