Cold Tomato-Dill Soup
["4 medium size ripe tomatoes, cut in wedges (5 c.)", "4 c. chicken broth", "2 large onions, cut in large chunks (2 c.)", "2 large garlic cloves, peeled", "1 Tbsp. tomato paste", "1 1/2 tsp. salt", "1/4 tsp. pepper", "1 1/2 c. buttermilk", "1/4 c. snipped fresh dill", "fresh dill and chopped tomato (for garnish)"]
["Bring tomatoes, broth, onions, garlic, tomato paste, salt and pepper to a boil in a 3 to 4-quart pot over high heat, stirring 2 to 3 times.", "Reduce heat to low; cover and simmer for 15 to 20 minutes, stirring 3 or 4 times, until onions are tender.", "Remove from heat.", "Cool slightly.", "With a slotted spoon, lift solids from pot into food processor or blender.", "Process in batches until smooth.", "Pour into a large bowl.", "Stir in broth from pot, buttermilk and dill.", "Refrigerate until chilled.", "Garnish each serving with chopped tomato and dill."]
["tomatoes", "chicken broth", "onions", "garlic", "tomato paste", "salt", "pepper", "buttermilk", "dill", "dill"]