1Heat oven to 400°F. Spray 1-quart casserole with cooking spray. In casserole, beat 1 tablespoon Bisquick® mix and the reserved liquid from tomatoes with wire whisk until blended. Stir in beans, chicken, corn and tomatoes; cut up large tomato chunks. Microwave on High 3 minutes; stir.
2In small bowl, beat 2/3 cup Bisquick mix, the milk and egg product with wire whisk until blended. Pour over mixture in casserole.
3Bake uncovered 23 to 28 minutes or until golden brown.