1Heat oven to 350°F. In 12-inch nonstick skillet, melt 1 tablespoon of the butter over medium-high heat. Cook mushrooms in butter 2 to 3 minutes or until tender. Remove from heat. Add stuffing and broth; stir until liquid is absorbed. Stir in cheese and 2 teaspoons of the sage.
2Make a pocket in each pork chop by cutting into side of chop toward the bone. Spoon stuffing mixture into each pocket; secure opening with toothpicks. Sprinkle pork with salt, pepper and remaining 1 teaspoon sage.
3In same skillet, melt remaining 2 tablespoons butter over medium-high heat. Add 3 pork chops; cook 4 minutes, turning once, until browned. Spray broiler pan rack with cooking spray. Place pork on rack in pan. Repeat with remaining pork chops. Brush chops with oil.
4Bake 20 minutes or until meat thermometer inserted in center of meaty portion reads 145°F. Let stand 3 minutes.