Toast sandwich
A toast sandwich is an english sandwich made with two slices of bread in which the filling is a thin slice of toasted bread, which may be heavily buttered. An 1861 recipe says to add salt and pepper to taste.
A recipe for toast sandwiches is included in the invalid cookery section of the 1861 Book of Household Management by Isabella Beeton, who adds, "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."