Pork Chops and Apples in the Crock Pot

6 pork loin chops, about 1-inch thick, trimmed of visible fat
2 tablespoons vegetable oil
salt
6 tart apples, such as Granny Smith, cored and thickly sliced
1/4 cup currants or raisins, optional
1 tablespoon lemon juice
1/4 cup brown sugar

Brown chops in oil over medium heat. Sprinkle with salt. Place pork chops in the crock pot; combine remaining ingredients and pour over the pork chops. Cover and cook on low for 7 to 9 hours, or on high 3 to 4 hours.