BRING broth to boil in medium saucepan on medium-high heat. Add rice and green beans; stir. Cover. Reduce heat to medium-low; simmer 5 min. Remove from heat; let stand 5 min. or until broth is completely absorbed.
MEANWHILE, brush both sides of chicken evenly with mustard; sprinkle with rosemary. Heat large nonstick skillet sprayed with cooking spray on medium heat. Add chicken; cook 5 min. on each side or until browned on both sides and cooked through (170°F). Remove from skillet; cover to keep warm.
ADD Neufchatel, milk and dressing to skillet; cook until Neufchatel is completely melted and mixture is well blended, stirring constantly with wire whisk. Serve chicken and rice drizzled with the sauce.