Heat a medium sauce pan over medium heat as you chop the red onion.
Spray the sauce pan with non-stick spray (or add 1 tsp. avocado oil) and add the onion. Allow the onion to cook 2 minutes.
As the onion is cooking, rinse and drain the black beans.
After 2 minutes, add the rest of the ingredients and put a lid on the sauce pan. Turn the heat up to medium high.
Cook for 5-6 minutes.
Turn off the heat and use the immersion blender to blend up 1/4 of the soup in the pan (about 4 quick pulses of the blender). Or transfer 1/4 of the soup to a blender and blend on high. Add the blended soup back to the pot. Stir well