Downunder Dolphin ... have you ever had a vegemite sandwich and are they any good?
I sure have. As a kid growing up in the 1970s and 1980s, a lot of us had them pretty regularly.
It's a spread that basically dates back to the era between WWI and WW2, very similar to Marmite in Britain in that it was a great use of a leftover resource (brewers yeast) to make a cheap, high energy and B vitamin spread, that served well as a cheap source of food and rations.
The flavor is very potent, bitter, malty and salty, best suited to toast and sandwiches. For many years it was seen as a bit of a morning staple (if you traveled by train or plane, or had room service breakfast, there was usually a tub of Vegemite and marmalade with butter for your toast)
There are some who insist it's (at least) part of a reasonable hangover cure...
https://www.youtube.com/watch?v=Hmnrpv6rVBc... but really, only an absolute idiot would try to eat it off a spoon straight out of the jar.
https://www.youtube.com/shorts/VrbySVt0wnY