Well, it's not the most interesting ingredient but it's pretty useful to take out with you as it's pretty clean. I used to cut it lengthways in the chip shape stylee (taking the seeds out) but interestingly the baby has recently decided that she quite likes it in the form of a thick-ish disc.  I think it might be because it is nicer to chew on, and the cooler the better, what with her poor teeth...