Place broth, tomatoes, onion, and bay leaf in pan and bring to boil. Cover and simmer for 10 minutes. Remove bay leaf and allow to cool. Place in blender and puree for a few minutes or use an immersion blender. Place back in pan- add pumpkin, salt, pepper, cloves, and lemon juice, simmer for a few minutes. Stir in cream. Serve. I've also experimented adding 1 teaspoon paprika. A couple drops of Tabasco adds a little kick.