Creating Creamy Parmesan Italian Sausage Soup is simple if you follow these easy steps:

1. Brown the Sausage: In a large pot over medium heat, add the Italian sausage. Cook until browned and fully cooked, breaking it apart with a wooden spoon, about 5-7 minutes.
2. Sauté Vegetables: Once the sausage is browned, add olive oil, diced onion, and minced garlic. Sauté until the onions are translucent, about 3-4 minutes.
3. Add Broth: Pour in the chicken broth and bring to a gentle simmer. Allow it to cook for about 5 minutes to blend the flavors.
4. Stir in Cream: Lower the heat and add the heavy cream, stirring until combined. Let it simmer gently for another 10 minutes, allowing the soup to thicken slightly.
5. Mix in Cheese: Gradually stir in the grated Parmesan cheese until melted and smooth.
6. Add Greens: Stir in the baby spinach (or kale) and let it wilt in the hot soup for about 2-3 minutes.
7. Season: Add Italian seasoning, red pepper flakes (if using), and season with salt and pepper to taste.
8. Simmer: Allow the soup to simmer for an additional 5 minutes to meld the flavors together.
9. Serve: Ladle the soup into bowls and garnish with fresh parsley, if desired.

These steps will guide you in creating this incredible soup effortlessly.