Saute onion in olive oil.
When onion becomes translucent, add cumin.
Cook 30 seconds, then add garlic and cook for another 30 to 60 seconds.
Add 1 can black beans and 2 cups vegetable broth.
Bring to a simmer, stirring occasionally.
Turn off heat.
Using a hand blender, blend the ingredients in the pot, or transfer to a blender.
Add the second can of beans to the pot along with blended ingredients and bring to a simmer.
Serve soup with bowls of red onion and cilantro for garnish.
I add a bit of cilantro to the pot, too.
