1 can (15 ounces) diced tomatoes
1/4 teaspoon ground black pepper
1 1/2 teaspoon chili powder
1 1/2 teaspoon ground cumin
2 teaspoons worcestershire sauce
1/2 teaspoon hot pepper sauce
2 teaspoons olive oil
1 pound boneless, skinless chicken breasts, cut into 1" pieces
1 medium onion, chopped
1 or 2 jalapeņo chile peppers, chopped
2 garlic cloves, minced
2 cans (14.5 onces each) reduced-sodium chicken broth
1/4 cup all purpose flour
1/2 cup water
1/3 cup fat free sour cream
1/3 cup chopped fresh cilantro
4 ounces reduced-fat tortilla chips, crushed
1. In a food processor or blender, combine the tomatoes (with juice), black pepper, chili powder, cumin, Worcestershire sauce, and hot-pepper sauce. Process to a smooth, thick consistency and set aside.
2. Warm the oil in a large pot over mediumhigh heat. When hot, cook the chicken, onion, jalapeņo pepper, and garlic, stirring frequently, for 5 minutes, or until the chicken is no longer pink and the onion is softened. Reduce the heat to low, add the tomato mixture and broth, and simmer, uncovered, for 15 minutes.
3. Meanwhile, in a small bowl, whisk together the flour and water until a smooth paste forms. Add to the soup and raise the temperature if necessary to keep the soup just barely boiling. Simmer for 5 minutes.
4. Remove from the heat, add the sour cream, and stir until well blended. Stir in the cilantro, garnish with the tortilla chips, and serve.