Need breakfast recommendations for tomorrow morning?

My mom and I are in town for a day and have a few hours tomorrow to pop into the city for breakfast. Chicago is my all time favorite city however I am in need of a good breakfast recommendation for her and I.
We are staying in Rosemont and can walk to the station but have to be back here by 3 pm.
I want to make the most of this quick jaunt!
Any quick things to do with her?
Thank you!