I'd carry a small bag of dried lentils, a small bag of quick oats, a bit of peanut butter, a few tins of flaked ham or flaked chicken, salt, sugar and tea bags or coffee. I'd also include trail mix and apples or other fruit. Those foods all cook up easily and store without refrigeration and they all provide plenty of energy. Rice or pasta also cook easily and store easily, but lentils provide a little more protein and a little more nutritional value.