Nothing was wasted during the war, items that we would normally discard today were used as this recipe from 1942 demonstrates. Do have another sandwich, vicar.
*Yeasrel was yeast extract. The nearest equivalents we have today would be Marmite or Vegemite.
Brown bread and butter
Wash lettuce thoroughly, dry, and chop up fairly small. If the lettuce is chopped up, it is possible to get a great deal more into the sandwich. It is also possible to use for sand- wiches some of the outer leaves that are not quite so attractive in a salad. These leaves are particularly rich in salts, but do not use leaves that are actually tough or bitter..
Spread half the bread and butter with a little Yeastrel, pile as much lettuce as convenient into the bread, cover with another slice of bread and butter, press down, and cut into four.