- 7 red bell peppers (2 3/4 pounds)
 - 1 medium onion
 - 1 small boiling potato
 - 2 tablespoons olive oil
 - 1 teaspoon ground cumin
 - 3 1/2 cups water
 - 2 cups chicken broth
 - 1 medium tomato
 - Accompaniment: lime wedges
 
- Quick-roast and peel peppers.Chop onion. Peel potato and cut into 1/4-inch dice. In a 5-quart heavy kettle heat oil over moderately high heat until hot but not smoking and sauté onion, potato, and cumin, stirring, 5 minutes. Add roasted peppers, water, and broth and simmer, covered, 20 minutes, or until vegetables are very tender.
 - While soup is cooking, peel and seed tomato.
 - Purée soup in batches with tomato in a blender (use caution when blending hot liquids), transferring to a bowl, and season with salt and pepper. Cool soup. Chill soup, covered, at least 4 hours and up to 2 days. Adjust seasoning.
 - Serve soup with lime wedges.