Cook bacon in a large enameled cast iron pot until browned and crisp, transfer bacon to a plate lined with paper towels. Leave 2 tablespoons rendered bacon drippings in pan and discarding remaining.
Heat drippings over medium-high heat and add onions, carrots and celery. Saut� 4 minutes then add garlic and saut� 2 minutes longer.
Add in chicken broth, tomato paste, sugar, thyme and beans. Stir in 3/4 of the cooked bacon, while reserving remainder in a small resealable bag in refrigerator until ready to use.
Season soup with salt and pepper to taste. Bring to a boil then reduce heat to low and allow to simmer, stirring occasionally, until veggies are soft, about 30 minutes.
Transfer 2 1/2 cups of the soup to a blender, cover with lid (while removing lids center insert and holding a folded kitchen towel over blender) blend until smooth. Stir pureed mixture back into soup.
Serve warm topped with shredded cheese and parsley. Thin soup with more broth or water if desired.