Lemon Pork Chops

4 (3/4-inch thick) bone-in pork loin chops
1/2 teaspoon salt
1/4 teaspoon pepper
1 medium onion, cut into 1/4-inch slices
1 medium lemon, cut into 1/4-inch slices
1/4 cup packed brown sugar
1/4 cup ketchup

Place pork chops in crock pot. Sprinkle with salt and pepper. Top with onion and lemon. Sprinkle with brown sugar; drizzle with ketchup. Cover and cook on LOW for 6 hours or until meat juices run clear.