I'm surprised no one mentioned it, but smooshing up a soft avocado mixing it with a small amount of Marmite then spreading it on toast is godlike. Top it with a poached egg and it's perfection.
As an American I was baffled by marmite/vegemite until an Englishman finally explained to me your not supposed to eat it like peanut butter. A small amount mixed with anything savory is delicious. It’s basically msg, salt, and B vitamins.