A variation on the classic cucumber sandwich found on FoodNetwork
Cucumber sandwiches contain little protein and so are generally not considered sustaining enough to take a place at a full meal. This is deliberate; cucumber sandwiches have historically been associated with the Victorian era upper classes of the United Kingdom, whose members were largely at leisure and who could therefore afford to consume foods with little nutritive value. Cucumber sandwiches formed an integral part of the stereotypical afternoon tea affair.
By contrast, people of the era’s lower working classes were thought to prefer a coarser but more satisfying protein-filled sandwich, in a “meat tea” that might substitute for supper.
Text from Wikipedia