We usually eat breakfast in our room to save time and money (whether we are on the dining plan or not). Here are some ideas from my DD6:
1. You could bring Rice Krispies cereal (one of her fav. cereals.)
2. Bagels (yummy)

and bread for toast. You can use the toaster and the microwave in the food court.
3. Fruit rollups or fresh fruit.
4. Frosted Flakes and Fruit Loops.
5. Poptarts (don't use in toaster at food court-can only use microwave.)
This is from me-DM46-My mom66 and I usually have cereal in the room along with a bagel or toast. I bring my DD her bagel and she eats it in the room and usually finishes it on the way to the parks, I also bring along a ziplock with dry cereal (she doesn't like milk with cereal). If you have to bring the food with you, it will limit your choices. If you can get to a store, you can
pick up a few things-like peanut butter-good on toast and bagels and pb&j
sandwiches and you can pick up some fruit-great to carry for snack too

. How about dried fruit or trail mix? Our local ranch market, Henry's, has a huge selection of trail mixes you can buy from bulk bins.
Like I said, we always eat in the room in the morning and with the
DDP I don't want to "waste" my credits on something we can do for pretty cheap on our own. Have a great time