I ran accross this on a backpacking site. It is geared nmore towards backpacking but she has some new twist on using different types of food.
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Has anyone tried the Nile Spice brand of dried soups? For canoe tripping I think they are great. Chicken Vegetable, Black Bean, Lentil, Potato Leek, Split Pea, Minestrone, Red Beans and Rice and a bunch more. They come in a paper cup with a peel off lid for rehydrating. Since the paper cups are 95% wasted space I transfer the contents to a tiny Ziplok bag bags which can be dumped into another device for rehydration. Or you can nest the empty cups together to save a lot of space.

If you go online there is a supermarket in New York City (Gristedes) that will mail order them out promptly at a reasonable cost. 

CanoeFly