ham and potato soup

Directions :

1. In a large pot, melt butter over medium heat. Add diced onion and cook until tender, about 5 minutes.
2. Add the diced potatoes, chicken broth, diced ham, chopped carrot, sliced celery, minced garlic, parsley, thyme, and pepper. Stir to combine.
3. Increase the heat to medium-high and bring the soup to a boil. Reduce to a simmer and cook for 20 minutes, or until the potatoes are tender.
4. Using a potato masher, mash some of the potatoes in the pot, add half and half, and simmer for an additional 5 minutes.
5. Combine the cornstarch with 1 tablespoon of water, stir into the soup, and simmer for 2 minutes.
6. Remove from the heat and stir in the sour cream. Taste and add additional salt and pepper if desired.