If you don’t have access to a microwave, you should invest in a good food thermos. Then you can make chili, soup, stew, pasta, potatoes with gravy, meatloaf, baked beans, lasagne, enchiladas or all sorts of hot dishes, that you can prepare ahead of time (make extra and freeze it in tupperware).
Pasta salad is always good too because you can put all sorts of different things into it each time you make it (and try different kinds of dressings): cheese, vegetables, cold meat, tofu, nuts, beans, greens etc.
And make a big green salad about once a week. You can mix up the ingredients any way you like. Get a good sized tupperware with a tight fitting lid for this. Make sure that you have either an insulated lunch bag or a bigger cooler to bring along with you for your lunches.
Then there are the pre-packaged lunch sized containers of: jello, pudding, cottage cheese, yogurt, applesauce etc.
Don’t forget about other pre-packed lunch time foods such as: string cheese, energy bars, raisins and other dried fruits and nuts.
And there’s always fruit (some can be taken to your destination whole and others can be washed, cut up and put into tupperware ahead of time): apples, oranges, pears, strawberries, pineapple etc.
And raw vegetables is super easy these days. Places like Trader Joe’s have them already cut up, washed and packaged for your convenience.
Every now and then, throw in some chips or a cupcake, but try not to make a big habit of eating potato chips every day. Try some healthier lower salt tortilla chips with some salsa instead. And make your own carrot or bran cupcakes at home. You can also freeze those. If you like chocolate, you can get some of those good individual sized bars of dark chocolate.
For your health’s sake, try to avoid soda. Get individual sized containers of milk, soymilk, iced tea, and 100% juice. Or get a good cold thermos for drinks.
It might help if you made out a menu each week and make sure to include a balanced meal for each lunch. When you go to the grocery store, plan ahead so you can make meals out of the same items (making different dishes) so that you don’t just buy a lot of random stuff. Bon Apetite!