Cook and stir chicken (2 minutes or until no longer pink) in large skillet coated with no stick cooking spray.
Stir in broth. Bring to boil. Stir in macaroni. Reduce heat to medium-low; cover. Simmer 8 to 10 minutes or until macaroni is tender.
Add Velveeta and broccoli; stir until Velveeta is melted.