Thanks, MechanicalJen, for this wonderful lunch! Very easy, and delicious. I made this with veggie broth instead of chicken broth, but I imagine that the chicken broth would only have made the flavor richer. I also used olive oil instead of butter. Just prior to adding the sour cream, I also added a generous pinch of baking soda to the soup (an old Italian grandma taught me that trick). After the foaming and bubbling has subsided, the baking soda takes away the sour edge from a tomato-based sauce or soup, but doesn't alter the flavor at all. Made for PAC Spring 2008.