For gravy, strain cooking juices into a class measuring cup. Skim off fat. Measure 1 cup juices, adding water, if necessary. Pour into a saucepan. In a small bowl stir the 2 tablespoons cold water into the flour until smooth; stir into the juice saucepan. Cook and stir over medium heat until thickened and bubbly. Stir in the apple. Cook and stir for 1 minute more or until heated through. If desired, season to taste with salt and pepper. Stir in parsley just before serving. Serve gravy with ribs and vegetables.