In a large pot brown the Italian sausage, drain off the grease. Add the shallot and garlic and sauté until fragrant.
Add the undrained tomatoes, broth, sweetener and spices. Stir well and bring the mixture to a low simmer. Allow the soup to simmer 10 minutes then remove from heat.
Stir in the spinach a handful at a time, until it wilts. Stir in the heavy cream. Add salt and pepper to taste.