Breakfast prep for non-morning people

Hi Blenders,

I seem to be having a lot of appointments recently that have me getting up early. I am NOT a morning person. So just wondering if anyone has breakfast ideas that are quick, easy and filling to do while in a brain fog in the morning. I have to get out the door fairly quickly.

I have done an overnight oats the night before as well as prepped egg "muffins". I am just looking for some other ideas.

Thanks in advance.