On the plus side: good chance to lose weight. How long is this for? I presume nuts are out of the question, too, right?

Would some form of cocoa drink, not involving any milk also be acceptable? Because that's something to vary your diet...

[Kathryn's influence has me trying to eat healthily at present. A great realisation, which of course is useless to you at present is that mini milks are actually really really healthy snacks - they're just milk!]