Cook the aromatics: In a large pot over high heat, add olive oil, onions and garlic. Cook for a couple of minute until the onions are translucent.
Cook the kale: Slowly add the kale, one handful at a time while stirring.
Cook the sweet potato: When the kale has soften, add the sweet potatoes and stir.
Simmer the soup: Add the celery, corn, and vegetable broth, and bring to a boil. Lower heat to a simmer, cover and cook for 30 minutes, or until the vegetables are tender.
Serve: Season with salt and pepper and serve.
Notes
Keep this kale soup in a storage container and refrigerate for up to 5 days.