Recently I've been really on the shake kick, after a few threads here of people talking about supplementing their dietary needs by this method. Sounded gross at first, but I've founds some awesome combos.
Here's my favorite so far:
3 Parts Hemp Protein Powder+Macca (Vanilla Spice by Living Harvest)
1-2 parts Raw Chia Seed (this stuff is extremely protein rich)
1 part either Powdered Goat's Milk, Milled Oats, or Quinoa
A bit of sugar.
I just mix this up a few servings in a ziplock before leaving, add to water and let sit a few, or even better, add hot water. It's actually pretty tasty.
Otherwise I like Thai Kitchen Rice Soup packets, they're lighter and healthier than Ramen. I also love Currey Cashews, and my major addiction is dried organic Mangoes.
Really love burritos for lunch also, I dehydrate taco meat style tvp with chopped small veggies and mushrooms, this stuff reconstitutes real fast. If you want a recipe, let me know, it's seriously good stuff.