1Heat oven to 400°F. Spray 3 (8- or 9-inch) square pans with cooking spray. In large bowl, stir together Bisquick mix, water and eggs. Spread evenly in pans. Sprinkle 1/2 cup of the cheese over batter in each pan.
2In 12-inch skillet, heat oil over medium-high heat. Cook chicken in oil, stirring frequently, until outsides turn white; drain. Stir in salsa; heat until hot. Spoon evenly over batter in pans to within 1/2-inch of edges.
3Bake 22 to 25 minutes or until edges are dark golden brown. Sprinkle 1/2 cup of the remaining cheese over each pan. Bake 1 to 3 minutes or until cheese is melted. Loosen from sides of pan; cut into squares.