Ha Lancair gets it, Obviously my hint was a good one. Don't know how many topics we have covered, but it is a lot! It is getting very hard to craft questions that are reasonably google proof.
An iconic product, that got a mention recently in the thread about a vegemite chicken recipe.
"In 1919, following the disruption of British Marmite imports after World War I and prior to the introduction of Vegemite, Callister's employer, the Australian company Fred Walker & Co., gave him the task of developing a spread from the used yeast being dumped by breweries. Callister had been hired by the chairman Fred Walker.[5] Vegemite was registered as a trademark in Australia that same year. Callister used autolysis to break down the yeast cells from waste obtained from the Carlton & United brewery. Concentrating the clear liquid extract and blending with salt and celery and onion extracts[6] formed a sticky black paste."
Most Aussies love it, to me it is an evil paste from hell, and I gag at the smell.
Over to you Lancair!