The above link will take you to a wonderful site that discusses baby food stages, how to make and store homemade baby food, and even gives you numerous recipes. It is a wonderful resource, and will aid you in your frugal adventures.
Making your own baby food would certainly save you a lot of money at the grocery store. Most, if not all, recipes can be made very cheaply.
This is the most well thought out site that I have come across so far.