One of the linked references also supplies these tasty ideas:
The toast sandwich isn't the only recipe in Mrs Beeton's compendium to use cold toast as the basis for a meal. She recommended toast soup - 1lb (0.45kg) of bread crusts boiled in 2oz (0.05kg) of butter and a quart (1.1 litres) of "common stock". Or for a refreshing drink, what about "toast-and-water"? Made with, you guessed it, a slice of stale loaf toasted, then soaked in a quart (1.1 litres) of boiling water until cold.
One of my favorite drinks, Korean in origin, is scorched rice water. When you cook rice in a stone pot (e.g. the same pot that is part of dolsot (inside stone) bibimbap), the bottom layer gets deliciously scorched and you get tasty water if you add boiling water, or you can cook it again to make a little porridge.
There's even little candies made out of that stuff, and I can only imagine toast and water is pretty much along the same lines.
The toast sandwich isn't the only recipe in Mrs Beeton's compendium to use cold toast as the basis for a meal. She recommended toast soup - 1lb (0.45kg) of bread crusts boiled in 2oz (0.05kg) of butter and a quart (1.1 litres) of "common stock". Or for a refreshing drink, what about "toast-and-water"? Made with, you guessed it, a slice of stale loaf toasted, then soaked in a quart (1.1 litres) of boiling water until cold.
http://www.bbc.co.uk/news/magazine-15760897