1Heat oven to 375°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. In 12-inch nonstick skillet, melt butter over medium-high heat. Add pork chops; cook 8 to 10 minutes, turning once, until browned. Place pork chops in baking dish. Pour gravy over top.
2In same skillet, cook celery and onion over medium-high heat 3 to 5 minutes, stirring frequently, until tender; remove from heat.
3In small bowl, stir Bisquick mix, sage and milk until blended. Stir in celery and onion mixture. Drop large spoonful of dough onto each pork chop.
4Bake 20 to 25 minutes or until biscuits are golden brown and pork chops are no longer pink in center.