Heat the olive oil in a large pot over medium heat.
Add the ground turkey to the pot and cook until browned, breaking it into small crumbles with a wooden spoon.
Stir in the diced onion, carrots, and celery, cooking for 5-7 minutes until the vegetables begin to soften.
Add the minced garlic, dried oregano, sea salt, and black pepper, sautéing for another minute until fragrant.
Pour in the tomato puree, vegetable broth, and the rinsed cannellini beans.
Bring the soup to a gentle boil, then reduce the heat to low and simmer for 15 minutes to allow the flavors to meld.
Stir in the chopped kale and cook for an additional 2-3 minutes until the leaves are wilted and bright green.
Ladle the soup into a large bowl and serve hot.