1. Cook the Sausage:

1. In a large pot or Dutch oven over medium heat, cook the Italian sausage until browned and fully cooked (5-7 minutes). Break it into crumbles as it cooks.
2. Drain excess grease if necessary and set sausage aside.

2. Sauté the Aromatics:

1. In the same pot, add olive oil if needed, then sauté the onion for 3-4 minutes until soft.
2. Add garlic and cook for another 30 seconds until fragrant.

3. Make the Soup Base:

1. Stir in diced tomatoes, tomato sauce, chicken broth, Italian seasoning, salt, black pepper, and red pepper flakes (if using).
2. Bring to a simmer and cook for 10 minutes to let the flavors blend.

4. Add the Tortellini & Spinach:

1. Stir in the cooked sausage and tortellini.
2. Simmer for 5-7 minutes, until tortellini is tender.
3. Stir in the heavy cream and spinach. Let cook for 2 more minutes, until spinach wilts.

5. Serve:

1. Ladle into bowls and sprinkle with grated Parmesan cheese.
2. Serve hot with crusty bread or garlic toast. Enjoy!