This site goes into the details of Jewish dietary laws, what "keeping kosher" is, and what it actually isn't. Kosher isn't so much a matter of blessing the food as it is the manner in which it is prepared. Interestingly, the preparations have to do with being aware, consciously preparing the food in a manner that makes it more than something to feed your body and give you fuel, but literally helps to feed your soul as well.
Another interesting challenge is set forth here, which gives you a start on a Bible study on eating healthy, and reminds us that "I can do all things through Him who strengthens me." (Philipians 4:13)
Finally, there is a fascinating discussion of types of Fasts in the different traditions of Christianity, written by a doctoral student in Canada (references all included) that goes into the great and small fasts discussed in today's reflection.
There's always so much more to learn!