Heard of vegemite? It's Australian and very good for you. It's a bread spread, and I find it best on toast with margarine. You have to spread it very thin, because it has a very strong flavour. It's hard to describe to someone who hasn't tasted it, like cola, but the best way I can come up with is this: it's salty, almost soy saucy, yet creamy at the same time.
It has lots of iron and Vit B12 in it, and folate too. I tried it on toast with an egg just to see how it would taste: