01 - Heat olive oil in a large soup pot or Dutch oven over medium heat. Add the sausage, breaking it apart with a wooden spoon, and cook until evenly browned. Transfer the sausage to a plate using a slotted spoon, leaving the rendered fat in the pot.
02 - Add the diced onion, sliced carrots, and sliced celery to the pot. Cook for 5 minutes, stirring occasionally, until the vegetables have softened. Add the minced garlic and cook for an additional 1 minute until fragrant.
03 - Stir in the cubed butternut squash, dried thyme, ground nutmeg, and half of the chopped sage. Season generously with salt and pepper. Sauté for 2 to 3 minutes to coat the squash in the seasonings.
04 - Pour in the chicken broth and bring to a boil. Once boiling, reduce the heat to a simmer, cover the pot, and cook for 20 minutes until the butternut squash is fork-tender.
05 - Use an immersion blender to partially or fully purée the soup base for a creamy consistency. Leave some chunks intact for a heartier texture if desired.
06 - Return the browned sausage to the pot. Stir in the cheese tortellini and simmer uncovered for 6 to 8 minutes until the tortellini is cooked through and tender.
07 - Pour in the heavy cream and add the remaining chopped sage. Heat gently without boiling, then taste and adjust the seasoning with salt and pepper as needed. Remove from heat.
08 - In a small mixing bowl, combine the softened cream cheese, ricotta cheese, finely chopped sage, milk, and a pinch of salt and pepper. Blend until completely smooth and creamy.
09 - Ladle the hot soup into serving bowls. Add a generous spoonful of the sage cheese swirl to each bowl and gently swirl it into the surface with a spoon or knife. Garnish with extra fresh sage or cracked black pepper and serve immediately.