Easy Chicken 'n Broccoli Pie

1 -2 cups broccoli (thawed if frozen or cooked if raw)
1 1/2 cups shredded Cheddar cheese
1 cup cut-up cooked chicken
1/2 cup onion, finely chopped
1/2 cup baking mix
1 cup milk
1/2 teaspoon salt
1/4 teaspoon pepper
 2 eggs

Spray 9-inch glass pie plate with cooking spray. Sprinkle broccoli, 1 cup of the cheese, chicken and onion in pie plate. In medium bowl, stir remaining ingredients with wire whisk or fork until blended. Pour into pie plate. Bake at 400°F for 35 to 38 minutes or until knife inserted in center comes out clean. Sprinkle with remaining 1/2 cup cheese and let stand 5 minutes before serving.

Source: Betty Crocker