Food you've probably haven't tried

 Futility Closet

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A recipe for “toast sandwiches,” from Mrs. Beeton’s Dictionary of Every-Day Cookery, 1865:

Ingredients. — Thin cold toast, thin slices of bread-and-butter, pepper and salt to taste. Mode. — Place a very thin piece of cold toast between 2 slices of thin bread-and-butter in the form of a sandwich, adding a seasoning of pepper and salt. This sandwich may be varied by adding a little pulled meat, or very fine slices of cold meat, to the toast, and in any of these forms will be found very tempting to the appetite of an invalid.

“I’ve tried it and it’s surprisingly nice to eat and quite filling,” said the [Royal Society of Chemistry's] John Emsley. “I would emphasize that toast sandwiches are also good at saving you calories as well as money, provided you only have one toast sandwich for lunch and nothing else.”