Answer: Vegemite

Vegemite, like its English predecessor Marmite, is a savory spread beloved in the countries of Australia, New Zealand, and in the How-To Geek kitchen as well. The spread itself is something of a bit of culinary and entrepreneurial genius as it is primarily composed of the waste product of beer brewing: the spent brewer’s yeast. If there’s anything more clever and entirely Australian than producing millions of gallons of beer and turning right around and producing millions of jars of delicious spread with the leftovers, we don’t know what.

Between its introduction in 1922 and today, the Vegemite recipe has remained almost completely unchanged. The Vegemite manufacturing facility in Port Melbourne produces 22 million jars a year; the 1 billionth jar rolled off the processing line in 2008.

In addition to being a practical use of a waste product, it’s also the world’s most Vitamin B dense food with an enormous amount of thiamine, riboflavin, niacin, and folic acid in each serving.