Whenever I make a batch of pancakes, which I make with very high quality ingredients, I freeze a few. Then in the morning I can thaw one out in the microwave or toaster oven, spread some peanut butter on it, and roll it up like a burrito. I think they're delicious and so does my teenage daughter.
Plain yogurt with added ground flax seed and a bit of applesauce or low-sugar jam, or frozen berries, is also quick and nutritious.