Great topic! I prepare most of my own meals on long trips. I bring along a 12v cooler and a small propane stove. I'll try to find a place to get some hot coffee in the morning though, and the odd time I treat myself to a breakfast. Otherwise here's what I bring along:
Cereal (good to eat right out of the box or sometimes with milk in the AM)
Granola
Trail Mix/Nuts/Dried fruit
yogurt
fresh fruit (small amount - top up as needed)
raw veggies (baby carrots, broccoli, cauliflower, pea-pods)
canned goods (pasta, stew, soup, chili etc.)
backpacking food (sometimes - various meals)
beef jerky
peanut butter
bread/buns
crackers
tea
milk
juices/drinks (no sodas though)
5 gallon jug water
Basically I try to have a decent breakfast and then nibble at healthy stuff throughout the day. I find this keeps me alert and healthy. At dinner time I'll heat up a can of something or one of the backpacking type meals.