I pinned this recipe to my Recipe Pinterest board and it's from Lulu the Baker. You can go here for the recipe.
I've actually made this a few times. I always brown bag it for lunch and often take my leftovers. Every time I've taken this soup for my lunch, someone at work comments on how good it looks and asks for the recipe.
It's so easy to make and tastes really rich, creamy, and cheesy. It's real comfort food and great to enjoy on a cold day.