There have been times when I've run out of cold cereal and just ate everything else that I usually put in the cereal, and didn't even miss it (either nutritionally or taste-wise). Cereal is such a small part of what goes in my cereal bowl anyway.
A couple of tablespoons of nuts, a scoop of chia seeds, a couple of tablespoons of dried fruit or a half cup to a cup of fresh fruit, a scoop of Garden of Life protein powder, and enough hemp or coconut milk to dissolve the protein powder and make everything float.
Now that it's getting colder, I'm mostly back to oatmeal. I always have a big dollop of peanut butter in it though, which helps prevent a sugar crash from the grain.
Speed comes from what you put behind you. - Judi Ketteler