Creamy Carrot Soup
["1 medium onion, chopped", "2 Tbsp. butter or margarine, melted", "2 lbs. carrots, scraped and sliced", "3 c. chicken broth, divided", "1 c. half and half", "1/4 tsp. coarsely ground pepper", "pinch of salt", "1 8 oz. carton plain yogurt", "1 tsp. dill weed", "Garnish: fresh dill weed"]
["Cook onion in butter in Dutch oven over medium heat, stirring constantly.", "Add carrots and 1 cup broth.", "Bring to a boil; cover reduce heat and simmer until carrots are tender.", "Carefully spoon into blender; process until smooth.", "Return to Dutch oven; add remaining broth, half and half, pepper and salt.", "Cook over low until thoroughly heated, stirring constantly.", "With a wire whisk, stir in yogurt, at room temperature, and dill weed.", "Serve hot or chilled."]
["onion", "butter", "carrots", "chicken broth", "ground pepper", "salt", "yogurt", "dill weed", "dill weed"]