Here is a guide for anyone wanting to eat healthier fare than tuna noodle casserole but doesn't know where to start. (not that there is anything wrong with tuna noodle casserole; I love the stuff!). It's also pretty cheap once you get some basic ingredients.
My method is slightly different than a lot of others, that cook a complete meal at home. I tend to piece-meal (pun haha) mine together. I have suggestions for gluten-free and Paleo sides and sauces.
The series is in 6 parts, plus other links to drying veggies and meats.
Demeter's Dish: Eating Healthier on the Trail
Enjoy!
~Demeter