It is made by putting cheese and sliced ham between two slices of bread. The bread is sometimes buttered and toasted. Vegetables like lettuce, tomato, onion or pickle slices can also be included. Various kinds of mustard and mayonnaise are also common.
Gerber sandwich or “Famous Gerber sandwich” is an open faced sandwich made in St. Louis, Missouri. The Gerber consists of a half section of Italian or French bread, spread with garlic butter, and topped with ham, and Provel or Provolone cheese, seasoned with a sprinkling of paprika and then toasted.
It is believed that a German baker named William Wahr, who is thought to have emigrated from the Black Forest region of Germany, created the kummelweck roll while living in Buffalo, New York. A local pub owner is said to have used the roll to create the beef on weck, with the thought that the salty top of the roll would make his patrons purchase more drinks.