I know there are plenty of clever hikers and backpackers around these parts. What are your favorite, stupidly easy to prepare, meal recipes?

The conditions:
1) Ingredients must have long shelf-life and do not require refrigeration.
2) Minimal water used in cooking. (reuse of water, as in boiling pasta then using the boiling water for some other purpose, doesn't count)
3) Fewest possible pots, pans, and utensils to clean up.
4) For now, just store-bought ingedients (no foraging).

Please share your ideas with imagination-impaired cooks such as myself. Thanks in advance.