Black Bean Soup With Chipotle Chiles

Ingredients

• 1 tablespoon olive oil
• 2 medium-size red onions, chopped
• 1 medium-size red bell pepper, chopped
• 1 medium-size green bell pepper, chopped
• 4 garlic cloves, minced
• 4 teaspoons ground cumin
• 1 16-ounce package dried black beans
• 1 tablespoon chopped canned chipotle chiles
• 7 cups hot water
• 2 tablespoons fresh lime juice
• 2 teaspoons coarse kosher salt
• 1/4 teaspoon ground black pepper
• 1 cup plain nonfat yogurt
• 1/2 cup chopped seeded plum tomatoes
• 1/4 cup chopped fresh cilantro