I'm brand new here, so apologies if I'm restating common knowledge...

I was thinking the same thing this morning, as I'm currently committed to a diet that includes 6-10 ounces of veggies with lunch and dinner. I did some googling, and there's a huge variety of freeze-dried and dehydrated veggies out there:
http://shop.honeyville.com/freeze-dried-green-beans.html
http://shop.honeyville.com/freeze-dried-broccoli.html
http://shop.honeyville.com/dehydrated-carrots.html

The freeze-dried stuff will likely re-hydrate with cool water... although I've never tried it. This place also has lots of stuff like diced ham, turkey, beef, as well as a bunch of flavored textured vegetable protein (TVP) that I'm curious about. I ran some numbers, and based on what they quote for broccoli (5 pounds of fresh broccoli per can), it's only about $3.25/lb of reconstituted broccoli. That's not too bad!

I can't have flour or sugar, so I'll likely be assembling my own dried meals from ingredients like these. Should be interesting!

-Rodney