Cut the sausage links out of casing and break into bite size pieces. Dice the yellow onion and mince the garlic cloves.
Heat a large pot over medium heat. Pour the sausage into the pan to brown. Cook for 5 mins tossing frequently. Pour the onions and garlic into the pot and toss. Continue cooking for 3 minutes and then season with salt and pepper.
Pour chopped kale, white beans, and chicken broth into the pot. Bring the soup to a boil, cover and reduce to a simmer.
Simmer for 20 minutes and then stir in the red wine vinegar. Serve with parmesan cheese, fresh cracked black pepper and fresh bread.