Open sandwich spread. In Great Britain, open sandwiches are rare outside of Scandinavian delicatessens. Instead, there is "on toast" (e.g., cheese on toast). However, this is not considered a sandwich. The open sandwiches found in Great Britain are the Welsh rarebit and the Scotch woodcock, an open sandwich served historically at the colleges of the University of Cambridge and University of Oxford and in the refreshment rooms of the House of Commons of the United Kingdom as late as 1949. In North America an "open faced sandwich" may also refer to a slice of bread topped with warm slices of roasted meat
Avocado toast Times" article showcased a "special" way to serve avocado as the filling of a toasted sandwich. In another article published in "The New Yorker" on May 1, 1937, titled "Avocado, or the Future of Eating," the protagonist eats "avocado sandwich on whole wheat and a lime rickey." Jayne Orenstein of The Washington Post reports, “avocado toast has come to define what makes food trends this decade: It’s healthy and yet ever-so-slightly indulgent. It can be made vegan and gluten-free. It’s so Instagrammable that #avocadotoast has over 100,000 posts. And most important of all: It is wholeheartedly endorsed by Gwyneth Paltrow.”