IMO Marmite is best when made into a toasted sandwich with cucumber, tomato, lettuce (like a spring or italian mix...not iceberg or romaine) and some thin slices of red onion.
Crack of pepper, and some nice cheddar, you'll be rocking a sammich that makes you say "damn I wish I made two of those muthafuckas!"
Oh, you do need some butter as a base though, to help the marmite spread around. That stuff is potent and stickier than finger rub.
With that as a base recipe, are you willing to try it Buck?