sk1,
There are lots of ways to make a quick and calorie filled breakfast that tastes good. Think about other breakfast cereals than dry oatmeal for one thing.
~ Granola, grape nuts, mueseli, or other dry/crunchy cereals can be eaten dry if you like or chased with cold water or whatever your drink of choice is.
~ You can take the ones above and add dried fruit like raisins or cranberries to the mix for more fiber, sugar, taste and energy.
~ Add some protein powder or dried milk (non-fat or whole, your choice) and some water and you have an even better concoction that you can eat cold or, even better, warmed up a bit. If packaged in a ziplock baggie you can put it together (with the warm water) at camp and carry it to your first stop where it will have turned into a warm mixture you can eat right from the bag if you don't want to eat it at camp.
~ You might also want to check out the recipes for home made breakfast bars or energy bars that you can find on the backpacking forums. You basically make up your favorite mix, bake it in the oven, cut it into bars, and then wrap them up for use in the field.
Like mentioned above, you can get packets of stuff to add to any of your meals (butter, honey, ketchup, mustard, salsa, etc.) at fast food restaurants. Many grocery stores carry individual sized packets of peanut butter like HellsCanyon mentioned. You would be amazed at the variety of things that are offered in small/individual sized packages in your local stores these days.
Larry