In heavy 4-quart saucepan, cook sausage and jalapeños over medium high heat, stirring frequently until meat is no longer pink; drain. Add vegetables, garlic and chili powder to sausage mixture and sauté 5 minutes. Add beef broth and tomatoes; reduce heat and simmer 20 minutes. Stir in black beans and yogurt; cook 5 minutes. Serve with additional yogurt for topping.