Step 1 : Introduction to the question "Vegemite is a popular sandwich spread in Australia made primarily of what?"
A Vegemite sandwich is a simple dish, known to frequent the lunchboxes of school children in Australia. Vegemite is a thick, black food spread made from leftover brewers' yeast extract with various vegetable and spice additives. It was developed by Cyril Percy Callister in Melbourne, Victoria in 1922. Vegemite is considered as much a part of Australia's heritage as kangaroos and the Holden cars. It has become a unique and loved symbol of the Australian nation. The Australian rock band Men at Work refer to a "Vegemite sandwich" in the second verse of their 1981 hit song "Down Under".
