In a large pot, heat 2 tablespoons olive oil over medium heat. Add sausage and brown, stirring occasionally to break into smaller pieces, approximately 10 minutes.

Add onion, carrots, potato, and bay leaves. Season generously with kosher salt and cook until vegetables begin to soften, stirring occasionally, approximately 10 minutes. Add garlic and beans, and cook for another 2-3 minutes. Add kale, and cook until it becomes slightly wilted. Add chicken stock, season with salt and pepper, and cover with lid.

Bring soup to a boil, then reduce heat and keep at a simmer for about 45 minutes, although a bit longer is completely fine. The soup will thicken as the potatoes begin to release their starch into the soup.