Jews cannot eat pork, shellfish, scavenger birds, reptiles, and some insects. The list of permitted and unpermitted animals are in Leviticus 11. Note that all banned foods are scavengers or cold blooded, thereby insuring that baceria are not introduced in the food chain by contamination. Josh Owns
Another prohibition is the mixing of milk and meat together, based on the verses Exodus 23:19, Deuteronomy 14:21. Nothing which contains blood, based on the verse Leviticus 17:14, Leviticus 19:26, Deuteronomy 12:16.
All fruits and vegetables are permitted.