Low Carb Pumpkin Soup

1. Place a medium saucepan over moderate heat. Once warm, add the butter and heat until melted. 2. When butter is hot, add the onions and sauté, stirring occasionally until tender, about 3-4 minutes. 3. Add 3/4 teaspoon pumpkin pie spice and 1/4 teaspoon cayenne pepper to the saucepan. Stir just to combine and cook for 2 minutes. 4. Add the canned pumpkin and broth to the saucepan, stir, and let simmer for 8 minutes. Remove from heat. 5. Puree the soup with an immersion blender or transfer to a traditional blender, or whisk by hand until creamy. Stir in the evaporated cream mixing completely. 6. Top with fresh chopped parsley or basil if desired. 7. Note: a small pinch of each of the following ground spices can be substituted for pumpkin pie spice: mace, cinnamon, ginger, cloves, allspice, nutmeg.