A common recipe from the early 1900's, water toast is not considered an appealing meal, but stands to show human creativity with the means available to them.
Toast bread (via toaster, grill, etc.).
Boil the cup of water and add in salt, place boiling salt water in seperate dish
Dunk each piece individually in the hot water dish until sufficiently soaked
Spread butter on toast
Serve immediately
Realize making water toast was a bad idea
Dispose of immediately