Here's a suggestion for rehydrated stew...

Take some dehydrated mushromms, onions, tomatoes and meat (or whatever).
Add them to a water bottle or covered pot that has ample water in it.
Seal the top and let the food rehydrate throughout the day...

In the evening, heat up your stew, add your favorite spices and voila!

Works great if you're going on a day hike from base camp...so you don't
have to lug the extra water around all day...

Craig