This is done in a large kettle (steamer - preferably one with filled insert and vents in top). Put in enough water (6 to 8 quarts) so that it comes about 1" in the inner inserted perforated basket.

6 whole sm. potatoes
6 whole sm. onions
1 c. salt (yes one cup)

Boil water then place these ingredients in kettle with vents open. Boil 18 minutes. Add 10 to 12 steaks (cut cross-wise of whole fish) on top of potatoes and onions. Boil 12 minutes or until fish flakes with a fork. Drain by lifting basket out of boiling water. Serve with drawn butter, lemon juice and parsley, on large platter. Garnish with lemon and parsley.