1. Sprinkle chicken with Southwest seasoning. Heat 2 teaspoons of the oil in large nonstick skillet over medium heat until hot. Cook chicken 10 minutes or until no longer pink in center, turning once. Cut into 1-inch pieces. 2. Heat remaining 1 1/2 tablespoons oil in large pot until hot. Cook onion 5 minutes or until tender, stirring occasionally. Add mushrooms; cook 5 minutes or until tender, stirring occasionally. Add garlic; cook and stir 30 seconds or until fragrant. Stir in chiles, cumin, oregano, chili powder and cayenne pepper; cook 5 minutes, stirring occasionally. 3. Stir in broth, beans and chicken; bring to a boil. Reduce heat to medium-low; simmer 10 to 15 minutes to blend flavors. Serve topped with cheese, sour cream and tortilla chips.