1Heat oven to 400°F. Spray 8x4-inch loaf pan with cooking spray. In small bowl, stir Bisquick mix, egg product, water and garlic powder; spread in pan.
2In 10-inch nonstick skillet, cook bell pepper and onion over medium-high heat, stirring frequently, until tender. Stir in chicken, tomatoes and Italian seasoning; cook until hot. Spoon over batter. Sprinkle with cheese.
3Bake 20 to 23 minutes or until golden brown; loosen from sides.