I am a big fan of several inexpensive healthy foods. This is pretty much all I eat and I have lost 35 lbs in 4 months without the gym. My energy levels have been higher too.
Drinks
1. Water (with lemon)
2. Tea (green or black)
3. V8 or generic equivalent (low Sodium version)
Foods
1. Tuna (in water, strained)
2. Brown rice
3. Hard boiled eggs (no yolks)
4. Raw vegetables (celery, carrots, broccoli)
5. Raw fruit (apples, pears, plums, bananas)
6. Roasted almonds
7. Make your own salad
8. Fat free light yogurt.
Now if you add sugar to your tea, mayo to your tuna, butter to your rice, salt to your eggs, peanut butter to your celery ect then these foods become less healthy, but all of them are relatively cheap. They have good shelf life in the fridge and cover most of your dietary needs. I also take a multi vitamin and calcium supplement every day to get what I may be missing. If you eat small servings of this stuff continuously throughout your shift instead of a couple large meals your metabolism will constantly be going and you will get to a healthy weight and stable level of nutrition. It can really make a difference in your energy level, your skin, your sleep quality and other things people usually don't associate with diet.
-r