NYT: A Field Guide to the American Sandwich

A love letter to American sandwiches. And now I want a sandwich.

An avocado sandwich with sprouts at the Stand in Laguna Beach, Calif. CreditStuart Palley for The New York Times

There are five main families of sandwich in The New York Times Field Guide.
There are sandwiches made on Kaiser or "hard" rolls.
There are sandwiches made on soft buns.
There are sandwiches made on long hero or sub rolls.
There are sandwiches made on sliced bread.
And there are what we call "singulars," which are those creations on bread that falls outside these other groups but are still vital to the sandwich landscape, like the muffuletta.

A Field Guide to the American Sandwich - NYTimes.com