Reddit, help me win a bet! I need recipes for "food paste".

So my friends and I were discussing dietary habits and the entire group I was with decided that I needed variety and wouldn't be able to eat the same thing for a week straight. So I told them I'd be willing to eat a protein paste.

Here's the problem: I'm not that knowledgeable about dietary stuff. So I need a healthy and nutritious food paste that tastes bearable. I'm concerned some of the stuff online may not be able to sustain me for a weak or may disregard flavor entirely. I want a balance.

The Bet: The conditions of the bet are simple. I must eat a paste (referred to as "protein paste" but it wasn't specified what's actually in it) for an entire week and nothing else. If I lose, I admit I could not subsist on a diet of the same stuff. If I pull through, the people who took me up on the bet have to play Amnesia: The Dark Descent in the dark with headphones on. If I win I'll see about putting this on YouTube if my computer can handle recording it.

TL;DR: I need your best food paste recipes that won't put me in the hospital after eating them for a week.