Chicken Divan Casserole
Coat large nonstick skillet with cooking spray, heat over medium high heat. Add chicken, cook turning once, until browned, about 2 minutes per side. Add broth, cover. Reduced heat to medium, cook, turning once, until no longer pink in center, about 6 to 7 minutes per side.
Meanwhile, cook broccoli according to package directions, drain.
Stir flour into 1/4 cup half and half until smooth.
In pot over high heat combine remaining half and half with 2 tablespoons Parmesan, mustard powder and remaining seasoning, salt and garlic powder, bring to a boil. Reduced heat to medium, whisk in flour mixture. Cook, whisking, until thickened, about 3 minutes. Remove from heat.
Diagonally cut chicken into 1 inch thick slices. In shallow 6 cup baking dish alternately arrange chicken and broccoli. Pour sauce over casserole, sprinkle with remaining Parmesan. Broil until lightly browned about 2 to 3 minutes.