Food Guide

WATER - probably the most important! It can be pretty scarce especially during dry periods on mountain ranges. I'd recommend carrying 3-4L (unfortunately 3-4kg!) when the next reliable source is more than a few hours away. Most camp sites have reliable water but its often necessary to fill up beforehand.
milk powder
sugar
milo/coffee/tea
soup packets
gatorade powder (essential for hot days or when water is scarce)
deb (handy as an emergency meal)

I dehydrate my own meals to save weight and space in my pack.
A dehydrator costs around $80 - $120. This is pretty good value since most prepackaged freeze-dried meals will cost about $20 each and don't taste half as good.
You can prepare any meal using mince (beef, lamb, chicken or pork...) It rehydrates really well. Larger peices of meat become like beef jerky!
Cook the meal as normal. Place in the dehydrator overnight ( about 8-10 hours ). Any sauce/spices will become powdered.
Vegetables can be steamed or microwaved and then dried. They can then be added later when rehydrating your meal.
Examples of meals that can be dehydrated include:

I suggest soaking the meals in a pot for 20 minutes before cooking. (whilst setting up the tent is a good time if you usually arrive at camp late like us) This shortens the cooking time and conserves fuel.
Rice can be cooked simultaneously in the same pot. You'll need about 20 minutes cooking time and 2 parts water for each 1 part rice plus enough water to rehydrate the meat and vegetables.
Happy eating!