Let’s dive into the steps that will help you create this comforting bowl of goodness:

1. Heat the olive oil in a large pot over medium heat. Add the Italian sausage, breaking it apart with a spoon as it cooks. Cook until browned, about 5-7 minutes. Once cooked, remove and set aside, leaving the drippings in the pot.
2. Add the diced onion to the pot and sauté until translucent, about 3 minutes. Stir in the garlic and cook for another minute, enjoying the fragrant aroma that fills your kitchen.
3. Pour in the chicken broth, scraping up any browned bits from the bottom of the pot. This adds a depth of flavor that reminds me of the slow-cooked meals my grandmother used to make.
4. Add the diced potatoes, Italian seasoning, and red pepper flakes. Bring the mixture to a boil, then reduce the heat to a simmer. Let it cook until the potatoes are tender, about 15-20 minutes.
5. Return the cooked sausage to the pot, along with the fresh spinach. Stir until the spinach wilts, a vibrant green contrast to the creamy broth.
6. Stir in the heavy cream and let the soup heat through, being careful not to let it boil. Season with salt and pepper to taste.
7. Serve hot, garnished with grated Parmesan cheese if desired. Enjoy the comforting flavors that bring warmth to even the chilliest of days.