Curried Pumpkin Soup
["4 Tbsp. unsalted butter", "1 large (8 oz.) onion, chopped", "1 medium leek (white part only), cleaned and chopped", "1 lb. pumpkin puree (canned or fresh)", "4 c. chicken broth", "1 tsp. salt", "1/2 tsp. curry powder", "1/4 tsp. nutmeg", "1/4 tsp. white pepper", "1/4 tsp. ginger", "1 bay leaf", "1 c. half and half", "chopped chives (for garnish)"]
["Melt butter in 3-quart saucepan over moderate heat.", "Add onion and leek; saute, stirring often, until soft, about 8 minutes.", "Stir in pumpkin, chicken broth and spices.", "Bring to a boil, stirring; reduce the heat and simmer, uncovered, for 15 minutes.", "Remove bay leaf.", "Process in blender or food processor in batches.", "(May be refrigerated for 2 days or frozen, puree only.)"]
["unsalted butter", "onion", "only", "pumpkin puree", "chicken broth", "salt", "curry powder", "nutmeg", "white pepper", "ginger", "bay leaf", "chives"]