Let them see that your 'weird' diet is actually normal and tasty. This recipe should do it! I would sub bacon fat or dijon mustard for the olive oil.
Leaving it as a whole means you can slice it thin and everyone can have as much or as little as they like. It also means some parts are more rare than others, satisfying every preference. (my MIL likes to cook the crap out of every roast. We cheer when its accidentally a tiny bit pink in the middle). But yes, you can cut it into steaks instead.