While the recent posts have been nice, I will try to steer the post back a little towards food tips.

1) If you an egg person on a remote route, consider powdered eggs. Though not as good, they are not bad and are easy to make. Has a scrambled egg consistency.
2) If you like to partake of libations occasionally, consider a mini-liquor or mini-wine bottle. They typically hold 1 drink serving, bottles are lightweight plastic, and do not take up much space at all.
3) Use "real" bacon bits as a bacon substitute. They are typically found in the salad dressing aisle.
4) Minute rice is pretty good substitute for real rice if you are tired of ramen.
5) Individually-wrapped cheese keep pretty well for a few days if not in hot conditions.
6) Use butter flakes as a lightweight (and almost as good) substitute for real butter.
7) Snag the individual packets of mayonnaise, mustard, ketchup, jelly, and peanut butter at restaurants when possible. I ask the owner if I can buy a handful or two and if they do not give it to me, it is only a dollar or two. Much better than carrying a bulky larger, half-used jar the entire time.
8) Most "dollar stores" now carry frozen dinners. If the campground has a microwave, you can get your "Hungry Man" (ugh) cheaply and quickly.
9) Use re-hydrated water when possible, the de-hydrated stuff isn't very good, if you can find it. If you do, let me know where you got it.
10) The dish scrubbers and regular wash clothes by Lunatec are absolutely fantastic. Super light, durable, dry very quickly. Their towel is more of a large washcloth but still great as a wash cloth.
11) If only needing extra water infrequently, just use empty soda or Gatorade bottles. Lightweight and when you are done needing to carry extra water or need a clean one, you just trash the bottles.
12) If you have several food items or extra water bottles that won't fit inside a pannier, just place inside a shirt, knot up the shirt openings, and strap the "package" to the your bike somewhere.