I imagine that cram in this story is much like hardtack.  I will be checking this more thoroughly as we go, but I believe that cram is the only food mentioned in its chapters.  Please feel free to comment with your own recipes for cram.  I wonder if it is related to the recipe for cramsome bread.  We learn from the OED that it’s pasty dough for fattening up fowl before slaughter.

• 13.064 chiefly cram
• 13.064 (If you want to know what cram is,
• 15.028 chiefly cram,
• 15.028 but cram is much better than nothing –
• 15.060 and cram is beginning simply to stick

Update 2015.06.20: My prediction was incorrect, in Chapter 13, rushing water boils and dark depths of caverns stew, and Chapter 15 ends with bacon.

“cram, n.” OED Online. Oxford University Press, March 2015. Web. 9 May 2015.