Although hamburgers were eaten for quite some time in the U.S., it was not until the 1920s when an upstart company called White Castle created an intensive advertising campaign to prove to Americans that hamburgers could be made fresh, safely and were delicious. This was the first time in the U.S. that people across all economic spectrums were eating hamburgers in the U.S.
Source: Oxford Encyclopedia of Food & Drink in America, pp. 587-588
Amuse Bouche: Noun. Etymology: French: literally, entertains the mouth. A small, complimentary appetizer served at the beginning of a meal to awaken the taste buds. Leena Eats definition: a quick shot of gastronomic knowledge for the brain.