1Heat oven to 400°F. In 9-inch glass pie plate, stir chicken, chiles and taco seasoning until mixed. Sprinkle with cheese.
2In medium bowl, stir Bisquick mix, cornmeal, milk, egg and corn until blended. Pour over chicken mixture and cheese.
3Bake 25 to 30 minutes or until toothpick inserted in topping comes out clean. To serve, cut into wedges and top with lettuce, sour cream and salsa.