I bought these tiny Pyrex bowls a while back that are great. They're about the size of a fist, and have a rubber lid. They're great for transporting food, and make perfect single portion sizes. On days where I'm out of the house for 12+ hours, I usually have 5 or 6 of these bowls filled with food, and I transport them in a canvas bag bungeed in my bike basket.
Lentils and brown rice (staple of my diet)
Mixed greens w/cucumber, black olives, tomatoes, baby carrots (staple of my diet)
Sauteed or steamed veggies (another staple)
Zuchini, squash, cucumber, and/or carrot sticks (staple, and a good snack)
Cooked steel cut oats/oatmeal (usually for bussier days where I don't have time to eat)
Washed berries (another staple when they're in season)
I usually have 2 or 3 of the items listed above each day. Since these items provide a foundation for my diet, I'll add in some kind of protien or condiment to make things interesting. Also, I find that they're quite filling, taste better than processed food, and a super cheap when purchasing at a farmer's market or at Whole Foods/Trader Joes (SoCal grocery stores).
**I'll add in some kind of sauteed poultry/beef/pork into the lentil and rice dish, and maybe some kind of greens (like broccoli, asparagus, greenbeans). This is a pretty filling meal, so I'll have something like this mid-day in order to fuel the bike ride home.
**I really enjoy eating salads, so I usually carry a mixture of olive oil, flax seed oil, a no salt organic herb seasoning, lemon, and vinegar. These items are stored in tiny containers/jars and ziploc bags (for the herb seasoning)...after, I'll just shake them into the salad when I'm ready to eat. I never really have to worry about wilted lettuce and my "homemade" salad dressing is pretty healthy.
**The steamed veggies are a great side dish....very helpful when you're starving after biking. Also, you can get away with not having them refigerated all day long. Boiled greenbeans are great for this.
**Zuchini/squash/ect are great to peel and cut into little sticks. You can dip them in hummus or tahini if you like. I just like using them as finger food because they're low in carbs and are filled with nutrients. Also, they don't make you feel heavy and lethargic after eating a bag full of them.
**I like to cook a big batch of steel cut oats in a crock pot. I also mix in spices like cinnamon....mmm, so delicious. This one is a bit high on the carbs, so I'll usually have it during the winter (when I typically consume less food). But it's cheap, stores easily, and is a great filler when you've forgotten to go to the grocery store and you need meals that will not leave you hungry.
**Berries....probably my favorite part of the spring/summer. I like to mix in a tiny handful of raw nuts for protien.
My weekends are great because I can get creative with cooking. But when I have a lot of commuting to do, I find that the items listed above are great ways to keep you fueled, and away from junk food. They're also super easy to make, store, and transport. I really liked Cosmoline's post--I'm going to look into making soups more often. Those pics look great!