Step 1

Heat the butter in a large soup pot over medium-high heat. Add the bacon and cook, stirring, until crisp and most of the fat has rendered, about 1 minute. Using a slotted spoon, transfer the bacon to a paper towel-lined plate and set aside. Lower the heat to medium, add the onion, carrots, celery, and garlic and cook, covered, stirring occasionally, until soft and fragrant, about 8 minutes.

Step 2

Stir in the flour and cook, stirring, for 3 minutes. Pour in the broth and tomatoes and bring to a boil while whisking constantly. Tie the parsley sprigs, thyme, and bay leaf together with a piece of kitchen twine and add to the pot. Lower the heat and simmer for 30 minutes. Remove from the heat and allow to cool.

Step 3

When the soup base is cool, remove and discard the herb bundle. Working in batches, transfer the mixture to a blender and puree until smooth. Using a sieve over a large bowl, strain the tomato puree. Return the puree to the pot and reheat over medium heat.

Step 4

Whisk the heavy cream and salt into the soup and season with pepper to taste. Divide among warm soup bowls, garnish with the crispy bacon, and serve immediately.