We find this soup comes together fairly quickly with the use of a pressure cooker. The seasonings can saute, while the beans are being cooked. This means we also have reduced the liquid, which we have replaced with vegetable stock. We have kept the cumin where it is, but we've also upped the other spices somewhat.
I cut the oil in half. One cup seemed like to much. This is a very healthy soup but we found it bland and lacking in flavour I might try it again using a broth as part of the cooking liquid. I also use my hand blender and pureed the soup just a bit