Spray large skillet with non-stick cooking spray. Add chicken, cook and stir 2 minutes or until no longer pink. Stir in broth. Bring to a boil. Stir in macaroni. Reduce heat to medium-low, cover. Simmer 8-10 minutes or until macaroni is tender. Add Velvetta and brocolli. Stir until Velvetta is melted.