Heat the oil in a large pot over medium heat. Stir in the pepper andonion stir fry mix, garlic, and cumin, and cook 5 minutes, untilvegetables are tender. Mix in the tomatoes and chile peppers. Pourin the broth, and season with salt and pepper. Bring to a boil,reduce heat to low, and simmer 30 minutes.Mix corn into the soup, and continue cooking 5 minutes. Serve inbowls over equal amounts of tortilla chips. Top with cheese andavocado.