HEAT large nonstick skillet sprayed with cooking spray on medium-high heat. Add chops and onions; cook 10 min. or until chops are done (160°F), stirring onions occasionally and turning chops after 5 min. Transfer chops to plate; cover to keep warm. Continue cooking onions 5 min. or until golden brown, stirring occasionally.
ADD Worcestershire sauce to onions in skillet; mix well. Add chops; spoon onions over chops. Reduce heat to low.
MIX stuffing mix and hot water; spoon around edge of skillet. Top with cheese; cover. Cook 5 min. or until cheese is melted.