1. In a large nonstick skillet coated with cooking spray, cook chicken in oil over medium heat for 4-5 minutes on each side, or until juices run clear. Remove and keep warm.
2. Add creamer to skillet; cook over medium-low heat, stirring to loosen browned bits from pan. Whisk in mustard until blended.
3. Add grapes; cook and stir until heated through. Serve over chicken.