I suggest you let them ripen before you eat them. I like to put my unripen bananas in a brown paper bag with an apple, this process allows them to ripen super fast.
Well, if bananas are your staple food then that is going to be tough to manage. What if there are no ripe bananas for you to buy? Do you have other high calorie fruits available?
From my experience I know how sometimes I had to undereat for a day or two when I didn't manage it right and there was nothing else available at that time. Sometimes I had 80lbs of banans yet I did not have anything to eat because they were all not ripe.
What is the reason that you can not keep the whole box at home?
This lifestyle is not like cooked foods lifestyle. You can not order a take-away or go to your corner grocery in case you run out of food. You have to be prepared and always have enough food for at least 2-3 days.
I just did that tonight. Too many figs.. =)
If it burns your mouth it will burn your insides, do not eat unripe. :P
Order a case of dates right away: http://www.shieldsdategarden.com/p-49-khadrawi-dates-special-promot...
The Valencia oranges are getting pretty good right now, try eating a lot of those juiced with pulp to get in the calories.