Brown and crumble Italian sausage with the onions and garlic in a large skillet. Cook until no longer pink, drain fat, and set aside.In a large soup pot, bring chicken broth and potatoes to boil over high heat. Cook until potatoes are tender, about 15 minutes.Reduce heat to medium and stir in the softened cream cheese. Stir and cook for about five minutes, until cheese is melted.In a small bowl, mix together the milk and flour, then stir into the soup. Cook for a couple minutes more. Season the soup with salt, pepper, red pepper flakes, and oregano.Stir in the cooked sausage/onions and chopped kale and cook for another 1-2 minutes. Serve and enjoy!