It says a lot about eating lots of fruits, vegetables/herbs and grain, particularly bread. Some have hypothesized that they actually meant meat when they said bread back then.
It also talks about which animals you should eat and which you shouldn't.
For example:
You may eat any animal that has a divided hoof and that chews the cud.
However, of those that chew the cud or that have a divided hoof you may not eat the camel, the rabbit or the hyrax. Although they chew the cud, they do not have a divided hoof; they are ceremonially unclean for you.
The pig is also unclean; although it has a divided hoof, it does not chew the cud. You are not to eat their meat or touch their carcasses.
-Deuteronomy 14:6-8, NIV