In anticipation of the weather turning cooler, it's time to talk soup!

Really, I just made this thread to harvest ideas for the coming months, but hey, why not make this just a general soup thread?

To start, what is your favorite soup? Do you have a recipe for it?

I'm super into pho, and now that I work from home most of the week, I'm excited to just have a pot simmering all day! No particular recipe I follow for it, but I can find a few good ones that serve as a general guide for me when I do it.