Position broiler rack so that top of skillet will be 6" from heat source; preheat broiler. prepare potatoes according to package directions using milk and 2 tbs butter; reserve. heat 10" ovenproof skillet over medium - high heat. Add beef, gravy and Worcestershire. Cook, stirring; bring to boil. Over medium - low heat; cook 5 minutes. Add vegetables. Cook until meat is no longer pink, 5 minutes. Remove from heat; spoon or pipe potatoes over filling. Broil until lightly browned, 5 minutes.