Mon 11/02/09 03:11 PM
Unfortunately most packaged foods are crammed with salt, fat, sugar, and preservatives and the staying power of such meals is low for the calories that you are taking in. None of which are good if you are trying to eat healthy. No fridge space makes it especially hard. However, I had a friend who had no fridge space, and he either got a block of ice and stuck it in a large icechest and put his need-to-stay foods in it, or, when it was cool enough, he stored the food in a lidded garbage can on his porch (use a bungy if critters are a worry).
However, with those caveats in mind. I'd head to Trader Joes or a health food store and look at the boil in a pouch options. Also look at raw almonds/walnuts/hazelnuts, dried fruit, granola & nut bars, cereal mixes, etc. You should be able to find asceptically sealed milk, but if you can't try almond, soy, or rice milk in asceptic containers. Look for healthy, low-salt canned soups--Amy's makes some good ones. You can also make quick bean burritos with canned beans, some lowfat cheese, and whole wheat tortillas.
The key will be looking at the ingredients and the nutrition labels to make sure you stay with a good nutritional profile, get adequate protein, good carbs, and can watch the extraneous sugar/corn syrup/fat calories.
Also, look at camping supply stores for dehydrated meals ready to eat. Really, they are better (much better) than military MREs.
Good luck.