Appalachian trail food?

what are some lightweight foods that I can bring on the Appalachian trial that won't make my pack too heavy? I'm looking for things like dried food that you just add hot water too (i.e. I saw a guy with a small packet of powdered beef stew that he just poured into hot water). I know there is a brand that makes full meals that you just add water to, it's called mountain house but I'm afraid those might be a little bulky (if you've ever seen one). any help is appreciated.