What is good for a quick breakfast besides cereal and Proteinex, liquid protein?

Before surgery, I ate cereal for breakfast every morning. If I don't get any protein early on I am soooooo tired. I can't stand the taste of Proteinex liquid anymore. Any suggestions for a good quick breakfast?

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.