The little food market on the 3rd floor of the FFI has basic breakfast stuff - cereal, yogurt, bagels, muffins, breakfast sandwiches, milk, OJ, coffee, etc.. The price isn't great but it's convenient enough. I usually just grab a bowl of cereal and a yogurt and I'm good to go.
Otherwise, the premium grilled chicken wraps at McD's make for a quick and easy lunch or dinner without being too unhealthy.