Potato Kielbasa Soup

Add the onions, celery, carrots and garlic to the pot, and saute until becoming tender.
Pour in the chicken broth and add the potatoes to the pot. Bring to a boil, cover and simmer until the potatoes are tender. This takes about 15 minutes.
Return the sausage to the pot along with the milk, cheddar cheese and parmesan cheese. Simmer for another 10 minutes.
Add salt and pepper to taste, and serve immediately garnished with chopped parsley.