LUKE: It’s the third day in a row you’ve ordered soup for breakfast.
Because she has a cold, Lorelai has ordered chicken noodle soup and mashed potato for breakfast at the diner. Mashed potato is soft and easy to eat, even with a sore throat, while chicken noodle soup is well known as a home remedy for colds, clearing nasal congestion and providing nutrition and hydration at the same time. I have never heard of anyone eating them for breakfast though, even when ill, and I would have thought it wasn’t a good idea to go out to breakfast when you have a cold, spreading your germs in a place where people eat.
The Annotated Gilmore Girls 