In a large pot, cook the Italian sausage over medium heat until browned. Break it apart with a spoon for even cooking and drain excess fat.

Add the diced onion and minced garlic to the pot and sauté until the onions become translucent.

Stir in the chicken broth and diced tomatoes, bringing the mixture to a simmer.

Once simmering, add the heavy cream and Italian seasoning, stirring well.

Fold in the kale or spinach and let it cook for an additional 5 minutes until tender.

Season with salt and pepper to taste.

Serve hot, topped with freshly grated Parmesan cheese.