Brown the sausage in a Dutch oven with olive oil, breaking it up with a meat masher. Remove the sausage from the pot.
Add more olive oil, diced onion, carrots, celery, and fennel seeds. Cook until vegetables are soft.
Add minced garlic and tomato paste, cook until fragrant. Stir in flour and cook for a couple of minutes.
Pour in white wine, chicken stock, and return the sausage to the pot. Add Parmesan rind. Bring to a boil, then simmer for 10 minutes.
Stir in heavy cream and let it simmer for another 10 minutes.
Add cheese tortellini and cook according to package instructions.
Stir in fresh basil and parsley. Adjust seasoning if needed.
Serve hot and enjoy the creamy sausage tortellini soup.
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