1In medium soup pot melt butter. Saute onion and leek,stirring occasionally, until soft. Stir in pumpkin, chicken broth,salt,spices, and bay leaf. Bring to a boil. Lower heat and simmer uncoered for 15 minutes stirring occasionally.Remove bay leaf. Puree the mixture in batches in blender for smoother texture.Return to soup pot and add half n half...cook over moderate het until heated though.Adjust seasonings to taste.
2Can be made ahead of time and refrigerated for 2 days..Also can be frozen.