I made as much of my kid's baby food as possible. I would make it up ahead of time and freeze it in the ice cube tray. It worked great! The only thing I had difficulty pureeing was meat, too hard on my blender. So I ended up having to buy that in jars but would mix it with my own natural veggies. Another thing I did was express breast milk and then used that to mix with the whole grain cereals. I think that a lot of the baby food in the beginning is just getting them used to the idea of eating, not just drinking their food. Most of their nutrition comes from breast milk for at least the first 6-9 months. I agree with the others, definitely stay away from foods marked "dinners" or "desserts" (which have added sugar!)
Best of luck to you and your wife!