In a small bowl add chopped sweet potatoes and cover with water. Cook in the microwave for 3-4 minutes.
Meanwhile, heat olive oil in a large pot over medium heat and add onion. Saute for 2 minutes.
Drain water from the sweet potatoes. Add the sweet potato and corn to the pot. Stir and continue sauteing for another 2 minutes.
Add remaining ingredients, stir, and cover. Bring to a boil.
Once boiling, reduce heat and simmer for 20 minutes. Turn heat off.
Use an immersion blender to blend the soup or transfer soup to a high-speed blender* and blend until smooth.
Notes
*If using a high-speed blender, you may want to allow soup to cool for a while before transferring it to the blender if it's not supposed to contain hot liquids.