Heat the olive oil in a large pot and sauté the onions, carrots, garlic, and celery for a few minutes.
Add the stock, bay leaves, smoked paprika, thyme, and chili flakes and simmer for about 20 minutes until the carrots have softened and the flavors have had a chance to develop.
Add the cooked beans and the nutritional yeast and then season to taste with salt and pepper.
Now take about 1 ½ cups of the bean soup, - the liquid, beans, and vegetables - and blend to a smooth puree. Add this puree back into the soup and bring the whole thing back to a simmer.
Add the chopped kale and simmer for another minute or two until the kale has wilted.
Adjust seasoning to taste and serve.