Great question — answering as the UphillTech team:
Dehydrated food is key. Water weighs a LOT. Breakfast -- Any variation on oatmeal. You can make your own or buy prepackaged meals. Lunch -- Peanut butter on hard tack. (did i mention water?) Dinner -- Any dehydrated meal will do. I've used both Mountain House and Backpackers pantry. Snacks -- I prefer Clif bars and Justin Nut Butter for a good weight/calorie/taste compromise. Luna bars are more calories per ounce but (IMO) taste horrid. By far the biggest weight factor in food is going to be water. If you know your route will have water, carry minimal. I have went so far as to carry only one liter (emergency) and drink from a .5 liter bottle that I sterilize with a steripen or other...
Full answer by Russell Steen: https://outdoors.stackexchange.com/a/780 (CC BY-SA 3.0).
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